The Collaborative International Dictionary
Geraniaceous
Geraniaceous \Ge*ra`ni*a"ceous\, a. (Bot.) Of or pertaining to a natural order of pants ( Geraniace[ae]) which includes the genera Geranium, Pelargonium, and many others.
Wiktionary
geraniaceous
a. (context botany English) Of or pertaining to the family Geraniaceae of flowering plants, including the geranium.