adj. 1 triangular; of or relating to a triangle. 2 Biol. triangular in cross-section. 3 (of a crystal etc.) having an axis with threefold symmetry. trigonally adv.
[ med.L trigonalis (as TRIGON) ]
TRIGONAL
Meaning of TRIGONAL in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012