/bot"l brush'/ , n. Bot.
any of various trees or shrubs of the myrtle family, esp. of the genera Callistemon and Melaleuca, native to Australia and adjacent areas, having spikes of flowers with numerous conspicuous stamens.
[ 1705-15; BOTTLE 1 + BRUSH 1 ; so called from the resemblance of the flower spike to a brush used for cleaning bottles, with bristles on all sides of a central stem ]