any of several highly venomous, Old World elapid snakes of the genera Naja and Ophiophagus, characterized by the ability to flatten the neck into a hoodlike form when disturbed.
2.
any of several similar, related African snakes, as the ringhals.
3.
leather made from the skin of a cobra.
4.
(initial capital letter) Military. a single-engine, two-seat U.S. Army attack helicopter armed with missiles, rockets, and a 20mm cannon and in service since 1977.
1802, from Port. cobra (de capello) "serpent (of the hood)," from L. colubra "a snake," of uncertain origin. The word came to Eng. via Portuguese colonies in India, where the native name is nag.