hinge

中文： 铰链、折页、合页、活页

1. A jointed or flexible device that allows the pivoting of a door etc.
2. A naturally occurring joint resembling such hardware in form or action, as in the shell of a bivalve.
3. A stamp hinge, a folded and gummed paper rectangle for affixing postage stamps in an album.
4. A principle, or a point in time, on which subsequent reasonings or events depend. · This argument was the hinge on which the question turned.
5. The median of the upper or lower half of a batch, sample, or probability distribution.
6. One of the four cardinal points, east, west, north, or south.
7. A movement that presents itself as rotation when an off-centre fixed point is taken into account.
8. In polyamory, a person connected emotionally or sexually to two others who are not connected to each other.

复数 hinges