The Collaborative International Dictionary of English v.0.48:

Leather \Leath"er\ (l[e^][th]"[~e]r), n. [OE. lether, AS.
   le[eth]er; akin to D. leder, le[^e]r, G. leder, OHG. ledar,
   Icel. le[eth]r, Sw. l[aum]der, Dan. l[ae]der.]
   1. The skin of an animal, or some part of such skin, with the
      hair removed, and tanned, tawed, or otherwise dressed for
      use; also, dressed hides, collectively.
      [1913 Webster]

   2. The skin. [Ironical or Sportive]
      [1913 Webster]

   Note: Leather is much used adjectively in the sense of made
         of, relating to, or like, leather.
         [1913 Webster]

   Leather board, an imitation of sole leather, made of
      leather scraps, rags, paper, etc.

   Leather carp (Zool.), a variety of carp in which the scales
      are all, or nearly all, absent. See Illust. under Carp.


   Leather jacket. (Zool.)
      (a) A California carangoid fish (Oligoplites saurus).
      (b) A trigger fish (Balistes Carolinensis).

   Leather flower (Bot.), a climbing plant (Clematis Viorna)
      of the Middle and Southern States having thick, leathery
      sepals of a purplish color.

   Leather leaf (Bot.), a low shrub (Cassandra calyculata),
      growing in Northern swamps, and having evergreen,
      coriaceous, scurfy leaves.

   Leather plant (Bot.), one or more New Zealand plants of the
      composite genus Celmisia, which have white or buff
      tomentose leaves.

   Leather turtle. (Zool.) See Leatherback.

   Vegetable leather.
      (a) An imitation of leather made of cotton waste.
      (b) Linen cloth coated with India rubber. --Ure.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Leatherback \Leath"er*back`\, n. (Zool.)
   A large sea turtle (Sphargis coriacea), having no bony
   shell on its back. It is common in the warm and temperate
   parts of the Atlantic, and sometimes weighs over a thousand
   pounds; -- called also leather turtle, leathery turtle,
   leather-backed tortoise, etc.
   [1913 Webster] Leatheret