n. 1 a triangle. 2 an ancient triangular lyre or harp. 3 the cutting region of an upper molar tooth.
[ L trigonum f. Gk trigonon neuter of trigonos three-cornered (as TRI-, -GON) ]
n. 1 a triangle. 2 an ancient triangular lyre or harp. 3 the cutting region of an upper molar tooth.
[ L trigonum f. Gk trigonon neuter of trigonos three-cornered (as TRI-, -GON) ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012