the activity of managing or exerting control over something | one of the paired hinged shells of certain molluscs and of brachiopods |
(physiology) regulation or maintenance of a function or action or reflex etc | the entire one-piece shell of a snail and certain other molluscs |
a mechanism that controls the operation of a machine | control consisting of a mechanical device for controlling the flow of a fluid |
power to direct or determine | device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone |
discipline in personal and social activities | a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it |
great skillfulness and knowledge of some subject or activity | |
a standard against which other conditions can be compared in a scientific experiment | |
the economic policy of controlling or limiting or curbing prices or wages etc. | |
a spiritual agency that is assumed to assist the medium during a seance | |
a relation of constraint of one entity (thing or person or group) by another | |
the state that exists when one person or group has power over another | |