Noun
hypocotyl (plural hypocotyls)
(botany) In plants with seeds, that portion of the embryo or seedling between the root and cotyledons.
According to Bewley and Black (1978), Brazil nut storage is in hypocotyl, this place of storage is uncommon among seeds. Source: Internet
Europe In Europe, another popular variety is celeriac (also known, incorrectly, as celery root), Apium graveolens var. rapaceum, grown because its hypocotyl forms a large bulb, white on the inside. Source: Internet
Gymnosperm seedlings also have cotyledons, and these are often variable in number (multicotyledonous), with from 2 to 24 cotyledons forming a whorl at the top of the hypocotyl (the embryonic stem) surrounding the plumule. Source: Internet
Here the hypocotyl is a rudimentary axis between radicle and plumule. Source: Internet
Their hypocotyl grows out into an ant-inhabited tuber. Source: Internet