The Collaborative International Dictionary of English v.0.48:
Bennettitales \Bennettitales\ n. an order of fossil gymnospermous plans of the Carboniferous. Syn: order Bennettitales. [WordNet 1.5]WordNet (r) 3.0 (2006):
Bennettitales n 1: fossil gymnospermous plants of the Carboniferous [syn: Bennettitales, order Bennettitales]