Lewis Short
clāvĭcŭla | clāvĭcŭlārĭus, ĭi (noun F.m) : dim.id. *
* A small key, Caes. Germ. Arat. 195.
* A tendril, by which the vine clings to its props, Cic. Sen. 15, 52; id. N. D. 2, 47, 120; Col. 4, 6, 2; Plin. 23, prooem. § 5.
* A bar, bolt of the door, Hyg. Grom. 55.—Hence, , , , a key-keeper, jailer, Firm. Math. 3, 66.
Charlton T. Lewis, Charles Short, A Latin Dictionary