/ˌproʊtəˈspoʊr, ˌprɒt-/PROH-tuh-SPOHR, PROT-

Definitions

1. noun

A spore that gives rise to a sporophyte generation in a plant, typically in ferns and mosses, and is usually larger and more complex than a spore that produces gametophytes.

“The protospore develops into a mature sporophyte after several weeks.”