1. primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms; [syn: Cycadales, order Cycadales]
WordNet (r) 3.0 (2006):
order Cycadales
n 1: primitive tropical gymnosperms abundant in the Mesozoic,
now reduced to a few scattered tropical forms [syn:
Cycadales, order Cycadales]