PT, Pt, or pt may stand for:Capital Cargo International Airlines IATA airline designatorMitochondrial permeability transition, a loss of impermeability of the membranes of mitochondria that occurs under some pathological conditions such as traumatic brain injuryPacific Time zonePalestinian TerritoriesPanorama ToolsPulmonary hypertensionPararosaniline-toluidine histological stain.Park and Tilford Gardens an outdoor shopping center.Part, as in "pt II" meaning "part two".Part time work or study pat… (More on Pt)