Lewis Short
(verb) : căcūmĭno, āvi, ātum, 1, cacumen
* To point, make pointed (prob. formed by Ovid): summas cacuminat aures,Ov. M. 3, 195: saxoque cacuminat ensem,Sid. Carm. 7, 414: ova cacuminata,Plin. 10, 52, 74, § 145: apex in conum cacuminatus,Sid. Ep. 2, 2.
Charlton T. Lewis, Charles Short, A Latin Dictionary