Толковый словарь английского языка Oxford English Reference - buna

n. a synthetic rubber made by polymerization of butadiene. Etymology: G (as BUTADIENE, natrium sodium) BUNCH n. & v. --n. 1 a cluster of things growing or fastened together (bunch of grapes; bunch of keys). 2 a collection; a set or lot (best of the bunch). 3 colloq. a group; a gang. --v. 1 tr. make into a bunch or bunches; gather into close folds. 2 intr. form into a group or crowd. Phrases and idioms bunch grass a N. American grass that grows in clumps. bunch of fives sl. a fist. Derivatives bunchy adj. Etymology: ME: orig. unkn.