- SYN: macrospore.
* * *mega·spore 'meg-ə-.spō(ə)r, -.spȯ(ə)r n1) a spore in heterosporous plants that gives rise to female gametophytes and is generally larger than a microspore2) MACROSPOREmega·spor·ic .meg-ə-'spōr-ik, -'spȯr- adj
* * *mega·spore (megґə-spor) [mega- + spore] 1. macrospore. 2. macroconidium. 3. one of four haploid spores, usually larger than the microspore, formed in the megasporangium from a megaspore mother cell, and from which the megagametophyte, or female gametophyte, develops.
Medical dictionary. 2011.