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 for Jib crane
From The Collaborative International Dictionary of English v.0.48 :

  Jib \Jib\ (j[i^]b), n. [Named from its shifting from side to
     side. See Jib, v. i.., Jibe.]
     [1913 Webster]
     1. (Naut.) A triangular sail set upon a stay or halyard
        extending from the foremast or fore-topmast to the
        bowsprit or the jib boom. Large vessels often carry
        several jibs; as, inner jib; outer jib; flying jib; etc.
        [1913 Webster]
     2. (Mach.) The projecting arm of a crane, from which the load
        is suspended.
        [1913 Webster]
     3. One that jibs, or balks; a jibber.
        [Webster 1913 Suppl.]
     4. A stationary condition; a standstill.
        [Webster 1913 Suppl.]
     Jib boom (Naut.), a spar or boom which serves as an
        extension of the bowsprit. It is sometimes extended by
        another spar called the flying jib boom. [Written also
        gib boom.]
     Jib crane (Mach.), a crane having a horizontal jib on which
        a trolley moves, bearing the load.
     Jib door (Arch.), a door made flush with the wall, without
        dressings or moldings; a disguised door.
     Jib header (Naut.), a gaff-topsail, shaped like a jib; a
        jib-headed topsail.
     Jib topsail (Naut.), a small jib set above and outside of
        all the other jibs.
     The cut of one's jib, one's outward appearance. [Colloq.]
        --Sir W. Scott.
        [1913 Webster]

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