1. The narrow neck of a bottle.
2. The narrowing of any conduit, especially if it limits the rate of flow.
ETYM Latin constrictio: cf. French constriction.
1. A narrowing that reduces the flow through a channel; SYN. bottleneck.
2. The action or process of constricting or squeezing.
ETYM Akin to nock; cf. od. nock, OSw. nocka. Related to Nick a notch.
(Irregular plural: notches).
1. A V-shaped indentation.
2. A small cut; SYN. nick, snick.