any reptile of the order Testudines, comprising aquatic and terrestrial species having the trunk enclosed in a shell consisting of a dorsal carapace and a ventral plastron.
2.
(not used technically) an aquatic turtle as distinguished from a terrestrial one. Compare tortoise( def 1 ).
verb (used without object)
3.
to catch turtles, especially as a business.
Idioms
4.
turn turtle,
a.
Nautical. to capsize or turn over completely in foundering.
b.
to overturn; upset: Several of the cars turned turtle in the course of the race.
Origin: 1625–35; alteration (influenced by turtle2) of Frenchtortue < Medieval Latintortūcatortoise
any of various aquatic chelonian reptiles, esp those of the marine family Chelonidae, having a flattened shell enclosing the body and flipper-like limbs adapted for swimmingRelated: chelonian, testudinal
2.
(US), (Canadian) any of the chelonian reptiles, including the tortoises and terrapins
3.
nautical a zip bag made as part of a spinnaker for holding the sail so that it can be set rapidly
4.
turn turtle to capsize
—vb
5.
(intr) to catch or hunt turtles
Related: chelonian, testudinal
[C17: from French tortuetortoise (influenced by turtle²)]
reptile, 1609, "marine tortoise," from Fr. tortue "turtle, tortoise," of unknown origin. The Eng. word is perhaps a sailors' mauling of the French one, infl. by the similar sounding turtle (2). Later extended to land tortoises. Turtleneck "close-fitting collar" is recorded from 1895.
turtle
"turtledove," O.E. turtle, dissimilation of L. turtur "turtledove," a reduplicated form imitative of the bird's call. Graceful, harmonious and affectionate to its mate, hence a term of endearment in M.E. Turtledove is attested from c.1300.