Crab

1crab pronunciation: function: noun usage: often attributive etymology: middle english crabbe, from old english crabba; akin to old high german krebiz crab and perhaps to old english ceorfan to carve — more at carvedate: before 12th century 1 plural crabs also crab : any of numerous chiefly marine broadly built decapod crustaceans: a : any of an infraorder (brachyura) with a short broad usually flattened carapace, a small abdomen that curls forward beneath the body, short antennae, and the anterior pair of limbs modified as grasping pincers b : any of various crustaceans of an infraorder (anomura) resembling true crabs in the more or less reduced condition of the abdomen 2 capitalized : cancer 13 plural : infestation with crab lice4 : the angular difference between an aircraft's course and the heading necessary to make that course in the presence of a crosswind