What is "perisperm"

Perisperm \Per"i*sperm\, n. [F. p['e]risperme. See Peri-, and Sperm.] (Bot.) The albumen of a seed, especially that portion which is formed outside of the embryo sac. -- Per`i*sper"mic, a.

n. (context biology English) The layer of nutritive tissue, derived from the nucellus, that surrounds the embryo of a seed in some angiosperms.

n. the nutritive tissue outside the sac containing the embryo in some seeds