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 for Point of contrary flexure
From The Collaborative International Dictionary of English v.0.48 :

  Point \Point\, n. [F. point, and probably also pointe, L.
     punctum, puncta, fr. pungere, punctum, to prick. See
     Pungent, and cf. Puncto, Puncture.]
     1. That which pricks or pierces; the sharp end of anything,
        esp. the sharp end of a piercing instrument, as a needle
        or a pin.
        [1913 Webster]
     2. An instrument which pricks or pierces, as a sort of needle
        used by engravers, etchers, lace workers, and others;
        also, a pointed cutting tool, as a stone cutter's point;
        -- called also pointer.
        [1913 Webster]
     3. Anything which tapers to a sharp, well-defined
        termination. Specifically: A small promontory or cape; a
        tract of land extending into the water beyond the common
        shore line.
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     4. The mark made by the end of a sharp, piercing instrument,
        as a needle; a prick.
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     5. An indefinitely small space; a mere spot indicated or
        supposed. Specifically: (Geom.) That which has neither
        parts nor magnitude; that which has position, but has
        neither length, breadth, nor thickness, -- sometimes
        conceived of as the limit of a line; that by the motion of
        which a line is conceived to be produced.
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     6. An indivisible portion of time; a moment; an instant;
        hence, the verge.
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              When time's first point begun
              Made he all souls.                    --Sir J.
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     7. A mark of punctuation; a character used to mark the
        divisions of a composition, or the pauses to be observed
        in reading, or to point off groups of figures, etc.; a
        stop, as a comma, a semicolon, and esp. a period; hence,
        figuratively, an end, or conclusion.
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              And there a point, for ended is my tale. --Chaucer.
        [1913 Webster]
              Commas and points they set exactly right. --Pope.
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     8. Whatever serves to mark progress, rank, or relative
        position, or to indicate a transition from one state or
        position to another, degree; step; stage; hence, position
        or condition attained; as, a point of elevation, or of
        depression; the stock fell off five points; he won by
        tenpoints. "A point of precedence." --Selden. "Creeping on
        from point to point." --Tennyson.
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              A lord full fat and in good point.    --Chaucer.
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     9. That which arrests attention, or indicates qualities or
        character; a salient feature; a characteristic; a
        peculiarity; hence, a particular; an item; a detail; as,
        the good or bad points of a man, a horse, a book, a story,
        [1913 Webster]
              He told him, point for point, in short and plain.
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              In point of religion and in point of honor. --Bacon.
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              Shalt thou dispute
              With Him the points of liberty ?      --Milton.
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     10. Hence, the most prominent or important feature, as of an
         argument, discourse, etc.; the essential matter; esp.,
         the proposition to be established; as, the point of an
         anecdote. "Here lies the point." --Shak.
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               They will hardly prove his point.    --Arbuthnot.
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     11. A small matter; a trifle; a least consideration; a
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               This fellow doth not stand upon points. --Shak.
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               [He] cared not for God or man a point. --Spenser.
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     12. (Mus.) A dot or mark used to designate certain tones or
         time; as:
         (a) (Anc. Mus.) A dot or mark distinguishing or
             characterizing certain tones or styles; as, points of
             perfection, of augmentation, etc.; hence, a note; a
             tune. "Sound the trumpet -- not a levant, or a
             flourish, but a point of war." --Sir W. Scott.
         (b) (Mod. Mus.) A dot placed at the right hand of a note,
             to raise its value, or prolong its time, by one half,
             as to make a whole note equal to three half notes, a
             half note equal to three quarter notes.
             [1913 Webster]
     13. (Astron.) A fixed conventional place for reference, or
         zero of reckoning, in the heavens, usually the
         intersection of two or more great circles of the sphere,
         and named specifically in each case according to the
         position intended; as, the equinoctial points; the
         solstitial points; the nodal points; vertical points,
         etc. See Equinoctial Nodal.
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     14. (Her.) One of the several different parts of the
         escutcheon. See Escutcheon.
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     15. (Naut.)
         (a) One of the points of the compass (see Points of the
             compass, below); also, the difference between two
             points of the compass; as, to fall off a point.
         (b) A short piece of cordage used in reefing sails. See
             Reef point, under Reef.
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     16. (Anc. Costume) A a string or lace used to tie together
         certain parts of the dress. --Sir W. Scott.
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     17. Lace wrought the needle; as, point de Venise; Brussels
         point. See Point lace, below.
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     18. pl. (Railways) A switch. [Eng.]
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     19. An item of private information; a hint; a tip; a pointer.
         [Cant, U. S.]
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     20. (Cricket) A fielder who is stationed on the off side,
         about twelve or fifteen yards from, and a little in
         advance of, the batsman.
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     21. The attitude assumed by a pointer dog when he finds game;
         as, the dog came to a point. See Pointer.
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     22. (Type Making) A standard unit of measure for the size of
         type bodies, being one twelfth of the thickness of pica
         type. See Point system of type, under Type.
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     23. A tyne or snag of an antler.
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     24. One of the spaces on a backgammon board.
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     25. (Fencing) A movement executed with the saber or foil; as,
         tierce point.
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     26. (Med.) A pointed piece of quill or bone covered at one
         end with vaccine matter; -- called also vaccine point.
         [Webster 1913 Suppl.]
     27. One of the raised dots used in certain systems of
         printing and writing for the blind. The first practical
         system was that devised by Louis Braille in 1829, and
         still used in Europe (see Braille). Two modifications
         of this are current in the United States:
     New York point founded on three bases of equidistant points
        arranged in two lines (viz., : :: :::), and a later
     American Braille, embodying the Braille base (:::) and the
        New-York-point principle of using the characters of few
        points for the commonest letters.
        [Webster 1913 Suppl.]
     28. In technical senses:
         (a) In various games, a position of a certain player, or,
             by extension, the player himself; as: (1) (Lacrosse &
             Ice Hockey) The position of the player of each side
             who stands a short distance in front of the goal
             keeper; also, the player himself. (2) (Baseball)
             (pl.) The position of the pitcher and catcher.
         (b) (Hunting) A spot to which a straight run is made;
             hence, a straight run from point to point; a
             cross-country run. [Colloq. Oxf. E. D.]
         (c) (Falconry) The perpendicular rising of a hawk over
             the place where its prey has gone into cover.
         (d) Act of pointing, as of the foot downward in certain
             dance positions.
             [Webster 1913 Suppl.]
     Note: The word point is a general term, much used in the
           sciences, particularly in mathematics, mechanics,
           perspective, and physics, but generally either in the
           geometrical sense, or in that of degree, or condition
           of change, and with some accompanying descriptive or
           qualifying term, under which, in the vocabulary, the
           specific uses are explained; as, boiling point, carbon
           point, dry point, freezing point, melting point,
           vanishing point, etc.
           [1913 Webster]
     At all points, in every particular, completely; perfectly.
     At point, In point, At the point, In the point, or
     On the point, as near as can be; on the verge; about (see
        About, prep., 6); as, at the point of death; he was on
        the point of speaking. "In point to fall down." --Chaucer.
        "Caius Sidius Geta, at point to have been taken, recovered
        himself so valiantly as brought day on his side."
     Dead point. (Mach.) Same as Dead center, under Dead.
     Far point (Med.), in ophthalmology, the farthest point at
        which objects are seen distinctly. In normal eyes the
        nearest point at which objects are seen distinctly; either
        with the two eyes together (binocular near point), or with
        each eye separately (monocular near point).
     Nine points of the law, all but the tenth point; the
        greater weight of authority.
     On the point. See At point, above.
     Point lace, lace wrought with the needle, as distinguished
        from that made on the pillow.
     Point net, a machine-made lace imitating a kind of Brussels
        lace (Brussels ground).
     Point of concurrence (Geom.), a point common to two lines,
        but not a point of tangency or of intersection, as, for
        instance, that in which a cycloid meets its base.
     Point of contrary flexure, a point at which a curve changes
        its direction of curvature, or at which its convexity and
        concavity change sides.
     Point of order, in parliamentary practice, a question of
        order or propriety under the rules.
     Point of sight (Persp.), in a perspective drawing, the
        point assumed as that occupied by the eye of the
     Point of view, the relative position from which anything is
        seen or any subject is considered.
     Points of the compass (Naut.), the thirty-two points of
        division of the compass card in the mariner's compass; the
        corresponding points by which the circle of the horizon is
        supposed to be divided, of which the four marking the
        directions of east, west, north, and south, are called
        cardinal points, and the rest are named from their
        respective directions, as N. by E., N. N. E., N. E. by N.,
        N. E., etc. See Illust. under Compass.
     Point paper, paper pricked through so as to form a stencil
        for transferring a design.
     Point system of type. See under Type.
     Singular point (Geom.), a point of a curve which possesses
        some property not possessed by points in general on the
        curve, as a cusp, a point of inflection, a node, etc.
     To carry one's point, to accomplish one's object, as in a
     To make a point of, to attach special importance to.
     To make a point, or To gain a point, accomplish that
        which was proposed; also, to make advance by a step,
        grade, or position.
     To mark a point, or To score a point, as in billiards,
        cricket, etc., to note down, or to make, a successful hit,
        run, etc.
     To strain a point, to go beyond the proper limit or rule;
        to stretch one's authority or conscience.
     Vowel point, in Arabic, Hebrew, and certain other Eastern
        and ancient languages, a mark placed above or below the
        consonant, or attached to it, representing the vowel, or
        vocal sound, which precedes or follows the consonant.
        [1913 Webster]

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