cricket

An insect in the order Orthoptera, especially family Gryllidae, that makes a chirping sound by rubbing its wing casings against combs on its hind legs.

(US, slang, humorous, in the plural) In the form crickets: absolute silence; no communication.

A signalling device used by soldiers in hostile territory to identify themselves to a friendly in low visibility conditions.

A relatively small area of a roof constructed to divert water from a horizontal intersection of the roof with a chimney, wall, expansion joint or other projection.