Man-of-war

n	1.	A government vessel employed for the purposes of war, esp. one of large size; a ship of war.
	2.	The Portuguese man-of-war. Man-of-war hawk (Zool.) the frigate bird. Man-of-war's man a sailor serving in a ship of war. Portuguese man-of-war (Zool.) any species of the genus Physalia; it is a hydrozoan having both medusa and polyp stages present in a single colony. It floats on the surface of the sea by a buoyant bladderlike structure, from which dangle multiple long tentacles with stinging cells. Its can cause severe rashes when it comes in contact with humans swimming in the area. See Physalia.

Noun	1.	man-of-war - a warship intended for combat Synonyms: ship of the line
	2.	man-of-war - large siphonophore having a bladderlike float and stinging tentacles Synonyms: jellyfish, Portuguese man-of-war

combat ship, ship of the line, war vessel, warship