n. Chem. an inert gaseous element of the noble gas group, forming a small portion of the earth's atmosphere and used in fluorescent lamps etc.
Usage:
Symb.: Kr.
Etymology: Gk krupton hidden, neut. adj. f. krupto hide
n. Chem. an inert gaseous element of the noble gas group, forming a small portion of the earth's atmosphere and used in fluorescent lamps etc.
Usage:
Symb.: Kr.
Etymology: Gk krupton hidden, neut. adj. f. krupto hide
Oxford English vocab. Оксфордский английский словарь. 2012