Bot. the spiral primary bud of germinating grain
Origin of acrospirealtered as if from acro- + spire from Eng dialect, dialectal akerspire from Old English æhher (Northumbrian dialect, dialectal ), ?ar, ear + sp?r, spire
(third-person singular simple present acrospires, present participle acrospiring, simple past and past participle acrospired)
- To put forth the first sprout.