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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY

perisperm

Noun

per=i=sperm

WORDNET DICTIONARY

perisperm(n = noun.plant) Array - the nutritive tissue outside the sac containing the embryo in some seeds; Array

perisperm, n. [F. périsperme. See Peri-, and Sperm.].

The albumen of a seed, especially that portion which is formed outside of the embryo sac. [1913 Webster]

perisperm, n. a mass of nutritive material outside the embryo-sac in some seeds.

Etymology

PERI- + Gk sperma seed

For further exploring for "perisperm" in Webster Dictionary Online