noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The layer of nutritive tissue, derived from the nucellus, that surrounds the embryo of a seed in some angiosperms. countable, uncountable
2. 2
   the nutritive tissue outside the sac containing the embryo in some seeds wordnet

Etymology

From French périsperme. See peri- and sperm.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.