target (redirected from Target group)

target

1. 

a. an object or area at which an archer or marksman aims, usually a round flat surface marked with concentric rings

b. (as modifier): target practice

2. Physics Electronics

a. a substance, object, or system subjected to bombardment by electrons or other particles, or to irradiation

b. an electrode in a television camera tube whose surface, on which image information is stored, is scanned by the electron beam

3. Electronics an object to be detected by the reflection of a radar or sonar signal, etc.

---

target [′tär·gət]

(atomic physics)

The atom or nucleus in an atomic or nuclear reaction which is initially stationary.

(computer science)

An index card or test document used to assist, reference, or calibrate equipment.

(electronics)

In an x-ray tube, the anode or anticathode which emits x-rays when bombarded with electrons.

In a television camera tube, the storage surface that is scanned by an electron beam to generate an output signal current corresponding to the charge-density pattern stored there.

In a cathode-ray tuning indicator tube, one of the electrodes that is coated with a material that fluoresces under electron bombardment.

(engineering)

The sliding weight on a leveling rod used in surveying to enable the staffman to read the line of collimation.

The point that a borehole or an exploratory work is intended to reach.

In radar and sonar, any object capable of reflecting the transmitted beam.

(ordnance)

A geographical area, complex, or installation planned for capture or destruction by military forces.

A paper or pasteboard item of square or rectangular shape designed to be fired upon from a specified range during practice or while testing an automatic firearm such as an automatic rifle, machine gun, or submachine gun; it is used to establish a degree of accuracy; it usually consists of a series of geometric patterns of various shapes on a common background.

(physics)

An object or substance subjected to bombardment or irradiation by particles or electromagnetic radiation.

---

target - SCSI target