Definitions

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.

Etymologies

epi- + cotyl(edon).
(American Heritage® Dictionary of the English Language, Fourth Edition)

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