What is "eusporangiate"

a. (context botany English) That has sporangium that were each formed from several epidermal cells; of, pertaining to, or characteristic of eusporangiate ferns.

adj. (of ferns) having sporangia that arise from a group of epidermal cells; "eusporangiate ferns of the families Ophioglossaceae and Marattiaceae" [ant: leptosporangiate]