nouns
decapod having eyes on short stalks and a broad flattened carapace with a small abdomen folded under the thorax and pincers
is a member of
an order of crustaceans (including true crabs) having a reduced abdomen folded against the ventral surface
is a type of (narrower)
crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax
the edible flesh of any of various crabs
a louse that infests the pubic region of the human body
a stroke of the oar that either misses the water or digs too deeply
"he caught a crab and lost the race"
is a type of (narrower)
the act of rowing as a sport