Frost smoke

An appearance resembling smoke, caused by the congelation of the vapor in the atmosphere in a time of severe cold. Frost'-weed, Frost-wort, n. ( Bot. ) See HELIANTHE IMG:content-0266.png:[blocks in formation] -v. a. To cause to foam. -v. n. To foam; to throw up spume, foam, or bubbles; as, frothing ale. Froth'ily, adv. With foam or spume; in an empty, trifling manner.