A bolt which has a mortise near the end, and is secured by a cotter or wedge instead of a nut.

A picklock.

plural of Key lime

(carpentry) fox wedge

A device for transmitting Morse code by hand, still used by radio amateurs today.

Alternative form of keyword

Dated form of keyword.

(computing, databases) In the design of a database table, a column (or an irreducible group of them) able to identify every row of the table. One of the candidate keys (abbreviated CKs) will be the primary key.

plural of key-fruit

(botany) A samara.