plural of APLer

(organic chemistry) Any tetrachloro derivative of phenolphthalein, but especially 4,5,6,7-tetrachlorophenolphthalein

A river that rises in Northamptonshire, England, and flows to the sea at The Wash.

(technology) A type of electric lamp for producing a beam of light in which the filament is sealed inside a unit consisting of the reflector and lens so as to ensure the alignment of the beam and t...