pterodactyl¹ helicoptering
pteranodon² helicopter (v.)
helicopter (n.) orthopter
brachypterous-Bz pteronophobia
pseudodipteral-at pteridophyte-Bb
Megaloptera-Bz Eurypteridae-p
Orthoptera-Bz pterylography-Bz
Chiroptera-Bz dipterous-Bz
tetrapterous-B apterium-Bz
lepidopterology-Bz peripteral-at
lepidopterist-Bz pteric-Bz
pteryology-Bz Pterosauria-p
apteryx-Bz Archaeopteryx-p
Caudipteryx-p Elopteryx-p
Pterospondylus-p Pteropelyx-p
Sinosauropteryx-p pteridology-Bb
pteropod-Bz pteryla-Bz
pterygobranchiate-Bz
dipteral-at
pterosaur-p
trichopter-Bz
Pteron—feather, wing
pyre
pyrophobia
funeral pyre
pyrotechnic empyreal⁴
pyrotechnics empyrean⁴
pyromaniac pyrites-mn
pyromania pyretic-md
Pyrex antipyretic-md
pyramid³ (n.) pyrolysis-CH
pyramidal pyrite-mn
pyramid (v.) pyromancy-gk
Egyptian pyramids pyrimidine-BCM
Pyracantha-Bb pyridoxal-BCM
pyroxene-mn empyreuma-gk
pyrography-a/gk ochropyra-md
pyroclastic flow-g pyrosis-md
xylopyrography-a/gk pyrometer-s pyro-v
pyrostat-s Pyralidae-Bz pyrimethamine-md
Pyroraptor-p pyrexia-md pyric-gk pyridoxine-BCM
pyramidal tract-an pyramid scheme-$ pyridoxamine-BCM
Pyriphlegethon-my pyroelectricity-s pyrogallol-md/a pyrolusite-mn
pyrometallurgy-ml pyromorphite-mn pyrope-gm pyrophosphoric acid-CH
pyrrhuloxia-Bz pyrrole-CH pyrogenic-g/gk/md pyrheliometer-s pyroxferroite-mn
Pyr—fire {pyro-}
¹See note 3, p. 459. ²See note 2, p. 539. ³A disputed etymology; in this suggestion, a pyramid, like this tree,
is shaped like a tongue of ‘fire.’ ⁴Ancient cosmologists taught about the empyrean, a realm of pure ‘fire’ which
existed in the highest heavens, hence the adjective empyreal, ‘lofty, sublime, elevated, celestial.’
577