crab

(redirected from True Crabs)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to True Crabs: Brachyura

crab

(krab),
1. A crustacean, many varieties of which are edible.
2. An insect, the crab louse, Pthirus pubis.

crab

(krăb)
n.
1.
a. Any of various chiefly marine decapod crustaceans of the infraorder Brachyura, having a hard carapace that covers a broad flattened cephalothorax with a small abdomen tucked beneath it, and an anterior pair of legs that are large and pincerlike.
b. Any of various similar decapod crustaceans, such as a hermit crab or a king crab.
c. Crabmeat.
2.
a. A crab louse.
b. crabs Slang Infestation by crab lice.

crab′ber n.

crab

a decapod CRUSTACEAN (suborder Brachyura) characterized by a large flattened, laterally expanded carapace below which the abdomen is curled forward.
References in periodicals archive ?
Flowever, differences in assemblages between culture plots and reference areas were illustrated by significant vector loadings associated with flatfish, hermit crab, sculpin, sea star, snail, and true crab (Brachyura).
Despite its name, it is not a true crab but is more closely related to spiders, ticks and scorpions.
Unlike true crabs, horseshoe crabs have more than one pair of claws and lack jaws and antennas.