a thing constructed; a complex entity constructed of many parts | one of the paired hinged shells of certain molluscs and of brachiopods |
the manner of construction of something and the arrangement of its parts | the entire one-piece shell of a snail and certain other molluscs |
a particular complex anatomical part of a living thing and its construction and arrangement | control consisting of a mechanical device for controlling the flow of a fluid |
the complex composition of knowledge as elements and their combinations | device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone |
the people in a society considered as a system organized by a characteristic pattern of relationships | a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it |