'Crayfish' definitions:

Definition of 'crayfish'

From: WordNet
noun
Warm-water lobsters without claws; those from Australia and South Africa usually marketed as frozen tails; caught also in Florida and California [syn: spiny lobster, langouste, rock lobster, crayfish]
noun
Tiny lobster-like crustaceans usually boiled briefly [syn: crayfish, crawfish, crawdad, ecrevisse]
noun
Small freshwater decapod crustacean that resembles a lobster [syn: crayfish, crawfish, crawdad, crawdaddy]
noun
Large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters [syn: spiny lobster, langouste, rock lobster, crawfish, crayfish, sea crawfish]

Definition of 'Crayfish'

From: GCIDE
  • Crawfish \Craw"fish`\ (kr[add]"f[i^]sh`), Crayfish \Cray"fish`\ (kr[=a]"f[i^]sh`), n.; pl. -fishes or -fish. [Corrupted fr. OE. crevis, creves, OF. crevice, F. ['e]crevisse, fr. OHG. krebiz crab, G. krebs. See Crab. The ending -fish arose from confusion with E. fish.] (Zool.) Any decapod crustacean of the family Astacid[ae] (genera Cambarus and Cambarus), resembling the lobster, but smaller, and found in fresh waters. Crawfishes are esteemed very delicate food both in Europe and America. The North American species are numerous and mostly belong to the genus Cambarus. The blind crawfish of the Mammoth Cave is Cambarus pellucidus. The common European species is Astacus fluviatilis.
  • Syn: crawdad, crawdaddy. [1913 Webster]
  • 2. tiny lobsterlike crustaceans usually boiled briefly.
  • Syn: crawdad, ecrevisse. [WordNet 1.5]
  • 3. a large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters.
  • Syn: spiny lobster, langouste, rock lobster, crayfish, sea crawfish. [WordNet 1.5]

Definition of 'Crayfish'

From: GCIDE
  • Crayfish \Cray"fish\ (kr[=a]"f[i^]sh), n. (Zool.) See Crawfish. [1913 Webster]