(obsolete except in methinks) To seem, to appear.

(pharmacology) An organophosphate larvicide used especially to treat water infested with disease-carrying fleas. [O,O,O′,O′-tetramethyl O,O′-sulfanediylbis(1,4-phenylene) diphosphorothioate].

An early photographic process in which the image is made on an iron plate having a sensitized surface film. / A photograph produced by this means.

A long, narrow sheet of ice projecting out from a coastline, forming when a valley glacier moves very rapidly out into a body of water.