From The Collaborative International Dictionary of English v.0.48 :
Cupressus \Cupressus\ n.
one of the genera of cypress trees, the type genus of the
Cupressaceae.
Syn: genus Cupressus.
[WordNet 1.5]
From WordNet (r) 3.0 (2006) :
Cupressus
n 1: type genus of Cupressaceae [syn: Cupressus, genus
Cupressus]