Gentianaceous

Gen`tian·a'ceous adjective (Botany) Of or pertaining to a natural order of plants ( Gentianaceæ ) of which the gentian is the type.
Found on http://www.encyclo.co.uk/webster/G/20

Gentianaceous

• (a.) Of or pertaining to a natural order of plants (Gentianaceae) of which the gentian is the type.
Found on http://thinkexist.com/dictionary/meaning/gentianaceous/
No exact match found