The DICT Development Group

Search for:
Search type:

Database copyright information
Server information

2 definitions found
 for Position micrometer
From The Collaborative International Dictionary of English v.0.48 :

  Position \Po*si"tion\, n. [F. position, L. positio, fr. ponere,
     positum, to put, place; prob. for posino, fr. an old
     preposition used only in comp. (akin to Gr. ?) + sinere to
     leave, let, permit, place. See Site, and cf. Composite,
     Compound, v., Depone, Deposit, Expound, Impostor,
     Opposite, Propound, Pose, v., Posit, Post, n.]
     [1913 Webster]
     1. The state of being posited, or placed; the manner in which
        anything is placed; attitude; condition; as, a firm, an
        inclined, or an upright position.
        [1913 Webster]
              We have different prospects of the same thing,
              according to our different positions to it. --Locke.
        [1913 Webster]
     2. The spot where a person or thing is placed or takes a
        place; site; place; station; situation; as, the position
        of man in creation; the fleet changed its position.
        [1913 Webster]
     3. Hence: The ground which any one takes in an argument or
        controversy; the point of view from which any one proceeds
        to a discussion; also, a principle laid down as the basis
        of reasoning; a proposition; a thesis; as, to define one's
        position; to appear in a false position.
        [1913 Webster]
              Let not the proof of any position depend on the
              positions that follow, but always on those which go
              before.                               --I. Watts.
        [1913 Webster]
     4. Relative place or standing; social or official rank; as, a
        person of position; hence, office; post; as, to lose one's
        [1913 Webster]
     5. (Arith.) A method of solving a problem by one or two
        suppositions; -- called also the rule of trial and
        [1913 Webster]
     Angle of position (Astron.), the angle which any line (as
        that joining two stars) makes with another fixed line,
        specifically with a circle of declination.
     Double position (Arith.), the method of solving problems by
        proceeding with each of two assumed numbers, according to
        the conditions of the problem, and by comparing the
        difference of the results with those of the numbers,
        deducing the correction to be applied to one of them to
        obtain the true result.
     Guns of position (Mil.), heavy fieldpieces, not designed
        for quick movements.
     Position finder (Mil.), a range finder. See under Range.
     Position micrometer, a micrometer applied to the tube of an
        astronomical telescope for measuring angles of position in
        the field of view.
     Single position (Arith.), the method of solving problems,
        in which the result obtained by operating with an assumed
        number is to the true result as the number assumed is to
        the number required.
     Strategic position (Mil.), a position taken up by an army
        or a large detachment of troops for the purpose of
        checking or observing an opposing force.
        [1913 Webster]
     Syn: Situation; station; place; condition; attitude; posture;
          proposition; assertion; thesis.
          [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Micrometer \Mi*crom"e*ter\, n. [Micro- + -meter: cf. F.
     An instrument, used with a telescope or microscope, for
     measuring minute distances, or the apparent diameters of
     objects which subtend minute angles. The measurement given
     directly is that of the image of the object formed at the
     focus of the object glass.
     [1913 Webster]
     Circular micrometer, or Ring micrometer, a metallic ring
        fixed in the focus of the object glass of a telescope, and
        used to determine differences of right ascension and
        declination between stars by observations of the times at
        which the stars cross the inner or outer periphery of the
     Double image micrometer, a micrometer in which two images
        of an object are formed in the field, usually by the two
        halves of a bisected lens which are movable along their
        line of section by a screw, and distances are determined
        by the number of screw revolutions necessary to bring the
        points to be measured into optical coincidence. When the
        two images are formed by a bisected object glass, it is
        called a divided-object-glass micrometer, and when the
        instrument is large and equatorially mounted, it is known
        as a heliometer.
     Double refraction micrometer, a species of double image
        micrometer, in which the two images are formed by the
        double refraction of rock crystal.
     Filar micrometer, or Bifilar micrometer. See under
     Micrometer caliper or Micrometer gauge (Mech.), a caliper
        or gauge with a micrometer screw, for measuring dimensions
        with great accuracy.
     Micrometer head, the head of a micrometer screw.
     Micrometer microscope, a compound microscope combined with
        a filar micrometer, used chiefly for reading and
        subdividing the divisions of large astronomical and
        geodetical instruments.
     Micrometer screw, a screw with a graduated head used in
        some forms of micrometers; turning the head one full
        revolution advances the position of the tip of the screw
        only by a little.
     Position micrometer. See under Position.
     Scale micrometer, or Linear micrometer, a minute and very
        delicately graduated scale of equal parts used in the
        field of a telescope or microscope, for measuring
        distances by direct comparison.
        [1913 Webster] Micrometric

Contact=webmaster@dict.org Specification=RFC 2229