資料來源 : Webster's Revised Unabridged Dictionary (1913)

   1. (Zo["o]l.) Any one of the numerous species of Testudinata,
      especially a sea turtle, or chelonian.

   Note: In the United States the land and fresh-water tortoises
         are also called turtles.

   2. (Printing) The curved plate in which the form is held in a
      type-revolving cylinder press.

   {Alligator turtle}, {Box turtle}, etc. See under {Alligator},
      {Box}, etc.

   {green turtle} (Zo["o]l.), a marine turtle of the genus
      {Chelonia}, having usually a smooth greenish or
      olive-colored shell. It is highly valued for the delicacy
      of its flesh, which is used especially for turtle soup.
      Two distinct species or varieties are known; one of which
      ({Chelonia Midas}) inhabits the warm part of the Atlantic
      Ocean, and sometimes weighs eight hundred pounds or more;
      the other ({C. virgata}) inhabits the Pacific Ocean. Both
      species are similar in habits and feed principally on
      seaweed and other marine plants, especially the turtle
      grass.

   {Turtle cowrie} (Zo["o]l.), a large, handsome cowrie
      ({Cypr[ae]a testudinaria}); the turtle-shell; so called
      because of its fancied resemblance to a tortoise in color
      and form.

   {Turtle grass} (Bot.), a marine plant ({Thalassia
      testudinum}) with grasslike leaves, common about the West
      Indies.

   {Turtle shell}, tortoise shell. See under {Tortoise}.

Alligator \Al"li*ga`tor\, n. [Sp. el lagarto the lizard (el
   lagarto de Indias, the cayman or American crocodile), fr. L.
   lacertus, lacerta, lizard. See {Lizard}.]
   1. (Zo["o]l.) A large carnivorous reptile of the Crocodile
      family, peculiar to America. It has a shorter and broader
      snout than the crocodile, and the large teeth of the lower
      jaw shut into pits in the upper jaw, which has no marginal
      notches. Besides the common species of the southern United
      States, there are allied species in South America.

   2. (Mech.) Any machine with strong jaws, one of which opens
      like the movable jaw of an alligator; as,
      (a) (Metal Working) a form of squeezer for the puddle
          ball;
      (b) (Mining) a rock breaker;
      (c) (Printing) a kind of job press, called also {alligator
          press}.

   {Alligator apple} (Bot.), the fruit of the {Anona palustris},
      a West Indian tree. It is said to be narcotic in its
      properties. --Loudon.

   {Alligator fish} (Zo["o]l.), a marine fish of northwestern
      America ({Podothecus acipenserinus}).

   {Alligator gar} (Zo["o]l.), one of the gar pikes
      ({Lepidosteus spatula}) found in the southern rivers of
      the United States. The name is also applied to other
      species of gar pikes.

   {Alligator pear} (Bot.), a corruption of {Avocado pear}. See
      {Avocado}.

   {Alligator snapper}, {Alligator tortoise}, {Alligator turtle}
      (Zo["o]l.), a very large and voracious turtle
      ({Macrochelys lacertina}) inhabiting the rivers of the
      southern United States. It sometimes reaches the weight of
      two hundred pounds. Unlike the common snapping turtle, to
      which the name is sometimes erroneously applied, it has a
      scaly head and many small scales beneath the tail. This
      name is sometimes given to other turtles, as to species of
      {Trionyx}.

   {Alligator wood}, the timber of a tree of the West Indies
      ({Guarea Swartzii}).