Definition of endosperm
: a nutritive tissue in seed plants formed within the embryo sac by division of the endosperm nucleus
Origin of endosperm
French endosperme, from end- + Greek sperma seed — more at sperm
First Known Use: 1819
Learn More about endosperm
Britannica.com: Encyclopedia article about "endosperm"
Seen and Heard
What made you want to look up endosperm? Please tell us where you read or heard it (including the quote, if possible).