plural of imp-pole

A Cartesian diver.

plural of bottle imp

Abbreviation of imperial gallon.

(transitive, now rare) To make a physical impact on. / (intransitive, figuratively) To interfere with. / (intransitive, figuratively) To have an effect upon, especially a negative one.

The act of impinging.

present participle of impinge

An impingement.

Third-person singular simple present indicative form of impinge

Any of several instruments in which fine particles (dust) in a gas are analysed by blowing them through a jet onto a wetted plate, prior to being counted. Typically used for particle analysis