RHAMNUS
Rhamnus, genus Rhamnus
(noun) type genus of the Rhamnaceae: buckthorns
Source: WordNet® 3.1
Etymology
From the genus name.
Noun
rhamnus (plural rhamnuses)
(botany) Any of the plants in the genus Rhamnus; a buckthorn.
Source: Wiktionary
Rham"nus, n. Etym: [NL., from Gr. rhamnos.] (Bot.)
Definition: A genus of shrubs and small trees; buckthorn. The California
Rhamnus Purchianus and the European R. catharticus are used in
medicine. The latter is used for hedges.
Source: Webster’s Unabridged Dictionary 1913 Edition