small light-brown cockroach brought to United States from Europe; a common household pest
Any one of numerous species of large, rapacious, aquatic, hemipterous insects belonging to Belostoma, Benacus, Zaitha, and other genera of the family Belostomatidæ
The oriental cockroach (Blatta orientalis), also known as the waterbug, is a large species of cockroach which is dark brown to black in color and has a glossy body
[ 'wo-t&r, 'wä- ] (noun.) before 12th century. Middle English, from Old English wæter; akin to Old High German wazzar water, Greek hydOr, Latin unda wave.