turtle

from The Century Dictionary.

• noun A turtle-dove.
• To pursue or capture turtles; make a practice or business of taking turtles.
• noun A tortoise; any chelonian or testudinate; any member of the Chelonia or Testudinata (see the technical names); especially, a marine tortoise, provided with flippers; absolutely, the green turtle, as Chelonia midas (see cut below), highly esteemed for soup. See cuts referred to under tortoise, also cuts under Aspidonectes, Eretmochelys, periotic, Pleurospondylia, slider, and stinkpot.
• noun The detachable segment of the cylinder of a rotary printing-machine which contains the types or plates to be printed: so called from its curved surface.
• noun (See also alligator-turtle, land turtle, mud-turtle, sea-turtle, snapping-turtle.)

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) Any one of the numerous species of Testudinata, especially a sea turtle, or chelonian.
• noun (Printing) The curved plate in which the form is held in a type-revolving cylinder press.
• noun etc. See under Alligator, Box, etc.
• noun (Zoöl.) 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 (Chelonia virgata) inhabits the Pacific Ocean. Both species are similar in habits and feed principally on seaweed and other marine plants, especially the turtle grass.
• noun (Zoöl.) a large, handsome cowrie (Cypræa testudinaria); the turtle-shell; so called because of its fancied resemblance to a tortoise in color and form.
• noun (Bot.) a marine plant (Thalassia testudinum) with grasslike leaves, common about the West Indies.
• noun tortoise shell. See under Tortoise.
• noun (Zoöl.) The turtledove.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun archaic A turtle dove.
• noun Any land or marine reptile of the order Testudines, characterised by a protective shell enclosing its body.
• noun Australia, UK A sea turtle.
• noun military An Ancient Roman attack method, where the shields held by the soldiers hide them, not only left, right, front and back, but also from above.
• noun computing A type of robot having a domed case (and so resembling the reptile), used in education, especially for making line drawings by means of a computer program.
• noun computing An on-screen cursor that serves the same function as a turtle for drawing.
• noun printing, historical The curved plate in which the form is held in a type-revolving cylinder press.
• verb To flip over onto the back or top; to turn upside down.
• verb To turn and swim upside down.
• verb To hunt turtles, especially in the water.
• verb video games To build up a large defense force and strike only punctually, rather than going for an offensive strategy.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb hunt for turtles, especially as an occupation
• noun any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming
• noun a sweater or jersey with a high close-fitting collar
• verb overturn accidentally