| Word | Definitions | Synonyms |
|---|---|---|
| gasp | (noun) a short labored intake of breath with the mouth open | Synonyms: pant |
| megasporangium | (noun) a plant structure that produces megaspores | Synonyms: macrosporangium |
| megaspore | (noun) larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte | Synonyms: macrospore |
| megasporophyll | (noun) in non-flowering plants, a sporophyll that bears only megasporangia | - |