eucalyptus

n. (pl. -tuses or -ti) (also eucalypt pl. -s) 1 tall evergreen australasian tree. 2 its oil, used as an antiseptic etc. [from *eu-, greek kaluptos covered]

n. A myrtaceous genus of trees, mostly Australian. Many of them grow to an immense height, one or two species exceeding the height even of the California Sequoia.