Definition of Hamamelidae

Noun: Hamamelidae

1. A group of chiefly woody plants considered among the most primitive of angiosperms; perianth poorly developed or lacking; flowers often unisexual and often in catkins and often wind pollinated; contains 23 families including the Betulaceae and Fagaceae (includes the Amentiferae); sometimes classified as a superorder
   - subclass Hamamelidae

See also:
Hamamelidaceae
Hamamelidanthum