noun
- Plural of perisperm; nutritive tissue in seeds that surrounds the embryo and endosperm, derived from the nucellus of the ovule.
Usage: botanical term; technical
Examples
- The perisperms in some seeds provide additional nutrients to support germination.
- Botanists examine the perisperms to understand seed structure and development.
- Unlike endosperm, perisperms develop from maternal tissue rather than from fertilization.
- The presence of perisperms varies significantly among different plant species.