弓的两端挂弦的位置;帆的前部上端
Nock \Nock\, n. [See {Notch}.] 1. A notch. He took his arrow by the nock. --Chapman. 2. (Naut.) The upper fore corner of a boom sail or of a trysail. Nock \Nock\, v. t. To notch; to fit to the string, as an arrow; to string, as a bow. --Chapman.
nock v : make small marks into the surface of; "score the clay before firing it" [syn: {score}, {mark}]