Prunus americana, native to eastern North America.

(historical, physics) An obsolete scientific model of the atom, devised shortly after the discovery of the electron but before the discovery of the atomic nucleus, and according to which the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges. It was disproved in 1909.

plural of plum pudding dog

A Dalmatian dog.

Used other than figuratively or idiomatically: see plum, in, mouth. / A plummy British accent.

(simile) With no effort on one's part.

simple past tense of shake the plum tree

present participle of shake the plum tree

Third-person singular simple present indicative form of shake the plum tree

(idiomatic, uncommon) To obtain a source of advantage, such as for political favors or appointments.