cotyledon

cotyledon definition - medical

cot·y·le·don (kŏtˌl-ēdˈn)

noun
  1. One of the lobules constituting the uterine side of the placenta, consisting mainly of a rounded mass of villi.
  2. A leaf of the embryo of a seed plant, which, upon germination, either remains in the seed or emerges, enlarges, and becomes green; a seed leaf.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.