- (in grasses) the first leaf above the ground, forming a sheath around the stem tip.
Origin of coleoptile
1865–70; < New Latin coleoptilum < Greek koleó(n) sheath, scabbard + ptílon soft feathers, down
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a protective sheath around the plumule in grasses
C19: from New Latin coleoptilum, from Greek koleon sheath + ptilon down, soft plumage
- A protective sheath enclosing the shoot tip and embryonic leaves of grasses.
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