Source : Webster's Revised Unabridged Dictionary (1913)

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.

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