A specified area, such as a group of card columns or a set of bit locations in a computer word, used for a particular category of data.

That part of an electric motor or generator which produces the magnetic flux which reacts with the armature, producing the desired machine action.

One of the equal parts into which a frame is divided in interlaced scanning for television; includes one complete scanning operation from top to bottom of the picture and back again.

A region or area with a particular mineral resource, for example, a gold field.

That area or space in which a particular geophysical effect, such as gravity or magnetism, occurs and can be measured.

An algebraic system possessing two operations which have all the properties that addition and multiplication of real numbers have.

The area in which surgery is taking place, bounded on all sides by sterilized tissue or drapes. Also known as sterile field.

See <<field of view>>

1. An entity which acts as an intermediary in interactions between particles, which is distributed over part or all of space, and whose properties are functions of space coordinates and, except for static fields, of time; examples include gravitational field, sound field, and the strain tensor of an elastic medium.

2. The quantum-mechanical analog of this entity, in which the function of space and time is replaced by an operator at each point in space-time.