plural of defence in depth

plural of defense in depth

(military, nautical, aviation) A form of bomb, launched from a ship or dropped from an aircraft, that is designed to detonate at a certain depth underwater for the purposes of attacking a submerged enemy, especially a submarine.

(transitive, military, nautical, aviation) To attack (a target, usually a submarine) with depth charges.

In photography, the distance in front of and behind the subject that appears to be in focus.

(geology) The depth below the Earth's surface of the hypocentre of an earthquake. / (optics) The field of view of a camera that is in sharp focus.

Alternative spelling of bit depth

(computer graphics) The number of bits (binary digits) used to represent the colour of a single pixel.

plural of focal depth

plural of Secchi depth