(zoology) Any pterosaur in the family Pteranodontidae.

plural of pteranodontid

(astronomy) A geocentric model of the solar system, described by the eponymous astronomer.

(baseball) Initialism of player to be named later (“an unspecified player, either not yet chosen or named publicly, at the time of a trade between teams”).

Alternative form of -pterous

(organic chemistry) A particular oxepinochromone.

(software engineering) Acronym of please take another look; please review and comment at the proposed change to software source code.

plural of PTA

plural of PTBNL

plural of PTC