plural of field hospital

The area that a projectile weapon (or group of weapons) can reach from a given position.

A pair of binoculars for observing "in the field". / A small monocular refracting telescope. / The larger of the image lenses of an optical device.

The use of an electric field to control the conductivity of a channel in a semiconductor, as in FET.

plural of field day

Used to describe the most common form of optical microscopy in which light is transmitted through the sample which appears on a bright background

The region of the neck, chest and armpits when the subject of radiotherapy

plural of field horsetail

(physics) The portion of an isotope shift produced by the changing shape of a nucleus upon the addition of a neutron

The part of an army's artillery which consists of (light) fieldpieces (cannons, howitzers) which are mobile enough to deploy on the (battle) field, as opposed to the fixed guns in fortifications or naval artillery; usually excludes antiaircraft.