'Crataegus' definitions:

Definition of 'Crataegus'

From: WordNet
noun
Thorny shrubs and small trees: hawthorn; thorn; thorn apple [syn: Crataegus, genus Crataegus]

Definition of 'Crataegus'

From: GCIDE
  • Crataegus \Cra*t[ae]"gus\ (kr?-t?"g?s), n. [NL., fr. Gr. krataigo`s.] (Bot.) A genus of small, hardy trees, including the hawthorn, much used for ornamental purposes. [1913 Webster]