- noun a manoeuvre in which an aircraft is steered slightly into a crosswind to compensate for flying slightly off course
- A short-tailed decapod (10-legged) crustacean which yields 38 to 50 per cent of its weight in edible meat. Varieties include: blue crab, jonah crab, mud crab, red crab, rock crab, shore crab, snow crab, southern stone crab, spanner crab and spider crab.
- noun a louse, Phthirius pubis, which infests the pubic region and other parts of the body with coarse hair.
- noun a member of the Royal Air Force
- noun an edible ten-footed crustacean with large pincers, which walks sideways
Origin & History of “crab”
Crab the crustacean (OE) and crab the apple (14th c.) may be two distinct words. The word for the sea creature has several continental relatives (such as German krebs and Dutch krabbe) which show it to have been of Germanic origin, and some of them, such as Old Norse krafla ‘scratch’ and Old high German krapho ‘hook’, suggest that the crab may have received its name on account of its claws. The origins of crab the fruit are not so clear. Some would claim that it is simply a metaphorical extension of the animal crab, from a perceived connection between the proverbial perversity or cantankerousness of the crustacean (compare crabbed) and the sourness of the apple, but others have proposed a connection with Swedish dialect skrabba ‘wild apple’, noting that a form scrab was current in Scottish English from at least the 16th century.