TU'BERCLE, noun [Latin tuberculum, from tuber, a bunch.] 1. A pimple; a small push, swelling or tumor on animal bodies. 2. A little knob, like a pimple, on plants; a little knob or rough point on the leaves of some lichens, supposed to be the fructification.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI