component

a constituent part; element; ingredient.

a part of a mechanical or electrical system.

They checked the pads, rotors, and other components of my car's brake system.

Physics. the projection of a vector quantity, as force or velocity, along an axis.

Physical Chemistry. one of the set of the minimum number of chemical constituents by which every phase of a given system can be described.

Mathematics.

1. a connected subset of a set, not contained in any other connected subset of the set.

2. a coordinate of a vector.

Linguistics.

1. one of the major subdivisions of a generative grammar.

   base component;

   transformational component;

   semantic component;

   phonological component.

2. a feature determined by componential analysis.

a constituent part or aspect of something more complex

a component of a car

Also called: element.  any electrical device, such as a resistor, that has distinct electrical characteristics and that may be connected to other electrical devices to form a circuit

maths

1. one of a set of two or more vectors whose resultant is a given vector

2. the projection of this given vector onto a specified line

one of the minimum number of chemically distinct constituents necessary to describe fully the composition of each phase in a system See phase rule