Perisperm

[perispә:m]

(noun.) the nutritive tissue outside the sac containing the embryo in some seeds.

Typed by Claire--From WordNet

(n.) The albumen of a seed, especially that portion which is formed outside of the embryo sac.

Edited by Bradley

n. (bot.) that which is round a seed the albumen.—adj. Perisper′mic.

Typed by Cyril