megaspore
me·gas·pore
noun
1.
larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
Origin
From mega- + spore.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.