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(Botany) the first shoot developing from the plumule of a germinating grain seed
[C17: from obsolete akerspire, from aker ear2 + spire sprout, spire1; the modern form is influenced by acro-]
the first sprout appearing in the germination of seed.
acrospire- The first leaf that sprouts from a germinating seed.
See also related terms for sprout.