1. A part of a mixture.

2. The smallest number of chemical substances which are able to form all the constituents of a system in whatever proportion they may be present.

Any electric device, such as a coil, resistor, capacitor, generator, line, or electron tube, having distinct electrical characteristics and having terminals at which it may be connected to other components to form a circuit. Also known as circuit element; element.

1. In a graph system, a connected subgraph which is not a subgraph of any other connected subgraph.

2. For a set S, a connected subset of S that is not a subset of any other connected subset of S.

A constituent part of a system; examples are a vector term which when added to others gives a vector sum, an ingredient of a chemical system, or the mineral portion of a rock.