What is "mucro"

Mucro \Mu"cro\, n. [L.] (Bot. & Zo["o]l.) A minute abrupt point, as of a leaf; any small, sharp point or process, terminating a larger part or organ.

n. (context botany zoology English) A pointed end, often sharp, abruptly terminate an organ, such as a projection at the tip of a leaf; the posterior tip of a cuttlebone; or the distal part of the furcula in Collembola.