n. (pl. -os or umbones) 1 the boss of a shield, esp. in the centre. 2 Bot. & Zool. a rounded knob or protuberance. øøumbonal adj. umbonate adj. [L umbo -onis]
UMBO
Meaning of UMBO in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012