acrospire

from The Collaborative International Dictionary of English v.0.48

Acrospire \Ac"ro*spire\, v. i.
   To put forth the first sprout.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Acrospire \Ac"ro*spire\, n. [Gr. ? + ? anything twisted.] (Bot.)
   The sprout at the end of a seed when it begins to germinate;
   the plumule in germination; -- so called from its spiral
   form.
   [1913 Webster]