D defs.my
Entry 2 senses Webster, 1913

Cotyledon

/(k?t`?-l?"d?n)/ · Cot·y·le·don · IPA /ˌkɑt.əˈliː.dən/
01 n. One of the patches of villi found in some forms of placenta.
  1. 1.
    One of the patches of villi found in some forms of placenta.(Anat.)
  2. 2.
    A leaf borne by the caulicle or radicle of an embryo; a seed leaf.(Bot.)