(military, US) A type of fast motor torpedo boat used by the US Navy during World War II.

plural of PT boat

(chemistry) Phenylthiocarbamide. / (education) Parent-teacher conference. / (medicine) Proton therapy center. / Abbreviation of pre-trial conference.

(Scouting) Philmont Training Center. / (education) Principals' Training Center. / (telecommunications) Pacific Telecommunications Council.

Initialism of parent-teacher association.

Initialism of prepaid ticket advice: information sent to an airline that a passenger will collect the ticket at the airport (not the same as an e-ticket).

(paleontology) A pterosaur in the genus Pterodactylus. / (informal) Any pterosaur.

Any of three species of small grouse in the genus Lagopus found in subarctic tundra areas of North America and Eurasia.

Any of several flying reptiles, of the extinct order Pterosauria, including the pterodactyls.

(chemistry) Any of various amines formed by putrefactive bacteria. / (dated) Food poisoning.