ˌkōlēˈäptə̇l, ˌkäl- noun
also co·le·op·ti·lum -tə̇ləm
( plural coleop·tiles -tə̇lz ; also coleopti·la -tə̇lə)
Etymology: New Latin coleoptilum, from cole- + -ptilum (from Greek ptilon down) — more at ptil-
: the first leaf of a monocotyledon forming a protective sheath about the plumule