mucro

n., pl., mu·cro·nes (myū-krō'nēz).
A sharp, pointed part or organ, especially a sharp terminal point, as of a leaf or shell.

[Latin mūcrō, mūcrōn-, sharp point.]

noun

A sharp or tapered end: acicula, acumination, apex, cusp, mucronation, point, tip¹. See sharp/dull.