from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Producing two types of spores differing in size and sex.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Producing both male and female gametophytes.
from The Century Dictionary and Cyclopedia
- Having more than one kind of asexually produced spores: applied to the vascular cryptogams, which have macrospores or megaspores (female spores) homologous with the embryo-sac of phanerogams, and microspores (male spores) homologous with the pollen-grains of phanerogams.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. characterized by heterospory
The development of the microsporangia and the contained spores (pollen-grains) is closely comparable with that of the microsporangia in Gymnosperms or heterosporous ferns.