Abbreviation of private (soldier).

(China, Singapore) Initialism of partnership enterprise.

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

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

(Greek mythology) King of the Teleboans in Plautus' Amphitruo.

plural of pteridophyte

plural of pteridologist

A person who studies ferns and other pteridophytes.

(botany) The scientific study of ferns and other pteridophytes.

Any plant of the division Pteridophyta, of simple vascular plants that reproduce via spores rather than seeds and that alternate generations of diploid (sporophyte) and haploid (gametophyte or prothallus) forms, the diploid generally being larger and more conspicuous.