noun.
The first leaf which rises above the ground in the germination of grain; also the rudimentary stem or first leaf which appears in malted grain; the developed plumule of the seed.
To throw out the first leaf; sprout.
the GNU version of the Collaborative International Dictionary of English
intransitive verb.
To put forth the first sprout.
noun.
The sprout at the end of a seed when it begins to germinate; the plumule in germination; -- so called from its spiral form.
noun.
The sprout at the end of a seed when it begins to germinate.
verb.
To put forth the first sprout.
Word Usage
"If the acrospire be suffered to proceed, the mealy substance melts into a liquid sweet, which soon passes into the blade, and leaves the husk entirely exhausted."