crab /kræb/ noun
[Sense 1-3: Language: Old English; Origin: crabba]
[Sense 4: Date: 1800-1900; Origin: crabbed]
1. [countable] a sea animal with a hard shell, five legs on each side, and two large claws ⇒ crustacean
2. [uncountable] the flesh of this animal that you can cook and eat:
dressed crab (=prepared for eating)
3. crabs [plural] informal a medical condition in which a type of louse (=insect) is in the hair around sexual organs
4. [singular] American English informal someone who becomes annoyed easily about unimportant things
Cambridge Advanced Learner's Dictionary - 4th Edition
crab / kræb / noun [ C or U ] (SEA CREATURE)
B2 a sea creature with five pairs of legs and a round, flat body covered by a shell, or its flesh eaten as food:
We walked along the beach collecting small crabs.
All the shops on the seafront had crab for sale.
This crab meat/salad is delicious!
crab / kræb / noun [ C or U ] (DISEASE)
crabs [ plural ] ( also ˈ crab lice )
small insects that can live in the hair around the sex organs
© Cambridge University Press 2013
crab [crab crabs crabbed crabbing] [kræb] [kræb] noun
1. countable a sea creature with a hard shell, eight legs and two pincers (= curved and pointed arms for catching and holding things). Crabs move sideways on land.
see also hermit crab
2. uncountable meat from a crab, used for food
• dressed crab
3. crabs (informal) the condition caused by having lice (called crab lice) in the hair around the genitals
Old English crabba, of Germanic origin; related to Dutch krabbe, and more distantly to Dutch kreeft and German Krebs; also to crab in the sense to grumble.
a) A crustacean of the infraorder Brachyura, having five pairs of legs, the foremost of which are in the form of claw s, and a carapace .
Although crabs themselves are an easily treated inconvenience, the patient and his partner(s) clearly run major STD risks
b) A bad-tempered person.
See Also: craber, crabier, crabite, crab-skuit, panier de crabes
a) To fish for crabs.
b) To complain .
Syn: crab apple