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2 definitions found
 for Sliding pair
From The Collaborative International Dictionary of English v.0.48 :

  Sliding \Slid"ing\, a.
     1. That slides or slips; gliding; moving smoothly.
        [1913 Webster]
     2. Slippery; elusory. [Obs.]
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              That sliding science hath me made so bare.
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     Sliding friction (Mech.), the resistance one body meets
        with in sliding along the surface of another, as
        distinguished from rolling friction.
     Sliding gunter (Naut.), a topmast arranged with metallic
        fittings so as to be hoisted and lowered by means of
     Sliding keel (Naut), a movable keel, similar to a
     Sliding pair. (Mech.) See the Note under Pair, n., 7.
     Sliding rule. Same as Slide rule, under Slide, n.
     Sliding scale.
        (a) A scale for raising or lowering imposts in proportion
            to the fall or rise of prices.
        (b) A variable scale of wages or of prices.
        (c) A slide rule.
     Sliding ways (Naut.), the timber guides used in launching a
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Pair \Pair\ (p[^a]r), n. [F. paire, LL. paria, L. paria, pl. of
     par pair, fr. par, adj., equal. Cf. Apparel, Par
     equality, Peer an equal.]
     [1913 Webster]
     1. A number of things resembling one another, or belonging
        together; a set; as, a pair or flight of stairs. "A pair
        of beads." --Chaucer. --Beau. & Fl. "Four pair of stairs."
     Note: [Now mostly or quite disused.]
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                 Two crowns in my pocket, two pair of cards.
                                                    --Beau. & Fl.
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     2. Two things of a kind, similar in form, suited to each
        other, and intended to be used together; as, a pair of
        gloves or stockings; a pair of shoes.
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     3. Two of a sort; a span; a yoke; a couple; a brace; as, a
        pair of horses; a pair of oxen.
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     4. A married couple; a man and wife. "A happy pair."
        --Dryden. "The hapless pair." --Milton.
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     5. A single thing, composed of two pieces fitted to each
        other and used together; as, a pair of scissors; a pair of
        pants; a pair of tongs; a pair of bellows.
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     6. Two members of opposite parties or opinion, as in a
        parliamentary body, who mutually agree not to vote on a
        given question (in order, for example, to allow the
        members to be absent during the vote without affecting the
        outcome of the vote), or on issues of a party nature
        during a specified time; as, there were two pairs on the
        final vote. [Parliamentary Cant]
     Note: A member who is thus paired with one who would have
           voted oppositely is said to be paired for or paired
           against a measure, depending on the member's position.
           [1913 Webster +PJC]
     7. (Kinematics) In a mechanism, two elements, or bodies,
        which are so applied to each other as to mutually
        constrain relative motion.
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     Note: Pairs are named in accordance with the kind of motion
           they permit; thus, a journal and its bearing form a
           turning pair, a cylinder and its piston a sliding
           pair, a screw and its nut a twisting pair, etc. Any
           pair in which the constraining contact is along lines
           or at points only (as a cam and roller acting
           together), is designated a higher pair; any pair
           having constraining surfaces which fit each other (as a
           cylindrical pin and eye, a screw and its nut, etc.), is
           called a lower pair.
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     Pair royal (pl. Pairs Royal) three things of a sort; --
        used especially of playing cards in some games, as
        cribbage; as three kings, three "eight spots" etc. Four of
        a kind are called a double pair royal. "Something in his
        face gave me as much pleasure as a pair royal of naturals
        in my own hand." --Goldsmith. "That great pair royal of
        adamantine sisters [the Fates]." --Quarles. [Written
        corruptly parial and prial.]
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     Syn: Pair, Flight, Set.
     Usage: Originally, pair was not confined to two things, but
            was applied to any number of equal things (pares),
            that go together. Ben Jonson speaks of a pair (set) of
            chessmen; also, he and Lord Bacon speak of a pair
            (pack) of cards. A "pair of stairs" is still in
            popular use, as well as the later expression, "flight
            of stairs."
            [1913 Webster]

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