Noun
(military) Initialism of armor-piercing discarding-sabot round.
Coordinate terms: APFSDS, AP, AT
(medicine) Initialism of activated phosphoinositide 3-kinase delta syndrome.
Source: en.wiktionary.orgThe scanners are apparently based on microminiature scintillators and amplified avalanche photodiodes (APDs) though a new system recently invented uses single chip silicon photomultipliers. Source: Internet
Between 1941 and 1943, the British combined the two techniques in the armour-piercing discarding sabot (APDS) round. Source: Internet