crab
Word family nouncrabbercrabstickcrabadjectivecrabbycrablikecrabwise
Biology, Food
crab /kræb/ ●●○ noun 1. 
[countableC]HB a sea animal with a hard shell, five legs on each side, and two large claws 蟹，螃蟹 → crustacean
[countableC]HB a sea animal with a hard shell, five legs on each side, and two large claws 蟹，螃蟹 → crustacean2 DF[uncountableU] the flesh of this animal that you can cook and eat 蟹肉
crab meat
蟹肉
dressed crab (=prepared for eating)
填在蟹壳里的熟蟹肉
3. crabs [plural] informalMI a medical condition in which a type of louse (=insect) is in the hair around sexual organs 阴蝨寄生病
4. [singular]ANNOY American EnglishAmE informal someone who becomes annoyed easily about unimportant things 脾气乖戾的人，易怒的人
Examples from the Corpus
crab• She's such a crab.• Sometimes you can find a Zebra flatworm sharing the snail shell with the hermit crab.• Alaskan king crabs• Form into 10 large crab cakes.• In the confusion, many crabs lose their foothold, tumble into the water and are swept away.• It is fair to warn anglers that thousands of crabs soon make short work of rag and lugworm.• The other crab, rather than being left homeless and therefore extremely vulnerable to predators, instantly jumped into the broken shell.• Not surprisingly, peeler crab is the best hookbait.• I'll have the crab cakes please.• There was less interest in the crabs and squat lobsters, which I claimed as my niche and shared amicably with others.• The fishing was great; you could pick up crabs off the beach.
1. Old English crabba
2. (1800-1900) crabbed