pur

plural purs

1. datedDated form of purr (“low murmuring sound as of a cat”).

   The first — called by Laennec, from its resemblance to the pur of a cat, the purring tremor — is nearly always indicative of a valvular lesion. The second is caused by the to-and-fro motion of a roughened pericardium.

   1895, Jacob Mendes Da Costa, Medical diagnosis, page 294

present singular third person purs · participle present purring · participle past purred · past purred

1. datedDated form of purr.

   a. 1828, John Gardiner Calkins Brainard, On Connecticut River And there the wild-cat purs amid her brood.

   1 more example

   It appears to me, past all doubt, that its [the goatsucker's] notes are formed by organic impulse, by the parts of its windpipe formed for sound, just as cats pur.

   1840, The Visitor: Or, Monthly Instructor, page 182

plural PURs

1. abbreviationcountableinitialismuncountablechemistryInitialism of polyurethane.
2. abbreviationcountableinitialismuncountablebroadcastingInitialism of person using radio.