The Australian eucalyptus, Eucalyptus globulus; a tall, straight tree, growing to 70 metres in height and 2 metres in trunk diameter.

A vegetable gum extracted from the seeds of the carob (locust beans) and used as a food additive; chemically, it is a galactomannan.

A tree, Liquidambar styraciflua, found in the southern US.

plural of sweet gum tree

(idiomatic, colloquial, US) To speak idly; to talk without effect.

plural of Tasmanian blue gum

In a difficult situation; in a predicament.

plural of locust bean gum

(informal) Synonym of throw a spanner in the works

Third-person singular simple present indicative form of gum up the works