from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The stem of a seedling or embryo located between the cotyledons and the first true leaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. In plants with seeds, that portion of the embryo or seedling above the cotyledons.
from The Century Dictionary and Cyclopedia
- n. In botany, the part of a growing embryo above the cotyledons.
epi- + cotyl(edon).(American Heritage® Dictionary of the English Language, Fourth Edition)