Definition of mesocotyl in English:

mesocotyl

Pronunciation /ˈmɛsə(ʊ)ˌkɒtl/

noun

Botany
  • In the embryos of many grasses: the part of the axis between the scutellar node and the coleoptile.

Origin

Early 20th century; earliest use found in Isaac Bayley Balfour (1853–1922), botanist. From meso- + cotyl-, apparently after German Mesocotyl.