From The Collaborative International Dictionary of English v.0.48 :
Coleus \Co"le*us\, n. [NL., fr. Gr. ? a sheath; -- referring to
the manner in which the stamens are united.] (Bot.)
A plant of several species of the Mint family, cultivated for
its bright-colored or variegated leaves.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
coleus
n 1: any of various Old World tropical plants of the genus
Coleus having multicolored decorative leaves and spikes of
blue flowers [syn: coleus, flame nettle]