A moveable surface attached to a machine such as an aircraft or submarine that can be used to control the machine's motion in roll, pitch or yaw.
A jointed or flexible device that allows the pivoting of a door etc.
A principle, or a point in time, on which subsequent reasonings or events depend.
One of the four cardinal points, east, west, north, or south.
A stamp hinge, a folded and gummed paper rectangle for affixing postage stamps in an album.
The median of the upper or lower half of a batch, sample, or probability distribution.
A movement that presents itself as rotation when an off-centre fixed point is taken into account.
A naturally occurring joint resembling such hardware in form or action, as in the shell of a bivalve.
To depend on something.
The breaking off of the distal end of a knapped stone flake whose presumed course across the face of the stone core was truncated prematurely, leaving not a feathered distal end but instead the scar of a nearly perpendicular break.
To attach by, or equip with a hinge.
To move or already be positioned in such a fashion that it presents itself as rotation when an off-centre fixed point is taken into account.