- paean n
- [L, hymn of thanksgiving esp. addressed to Apollo, fr. Gk paian, paion, fr. Paian, Paion, epithet of Apollo in the hymn] : a joyous song or hymn of praise, tribute, thanksgiving, or triumph
- paeon n
- [L, fr. Gk paion, fr. paian, paion paean] : a metrical foot of four syllables with one long and three short syllables (as in classical prosody) or with one stressed and three unstressed syllables (as in English prosody)
- palladium n
- [ME, fr. L, fr. Gk palladion, fr. Pallad-, Pallas, epithet for Athena, patron goddess of Athens] 1 : a statue of Pallas whose preservation was believed to ensure the safety of Troy 2 : safeguard 3 : a silver-white ductile malleable metallic element
- 1 pander n
- [ME Pandare Pandarus, fr. L Pandarus, a Lycian archer in the Trojan War who in legend procures Cressida for Troilus] 1 a : a go-between in love intrigues b : pimp 2 : someone who caters to or exploits the weaknesses of others
- 2 pander v
- to act as a pander; esp: to provide gratification for others' desires
- Pandora n
- [fr. L, fr. Gk: lit. all-gifted, the first woman, created by Hephaestus, given treacherously to Epimetheus along with a box in which Prometheus had confined all the evils of the world; as expected, Pandora curiously opened the forbidden box and thus released into the world all troubles of mankind] : a moon of Saturn
- Pandora's box n
- [fr. the box sent by the gods to Pandora] : a prolific source of troubles
- pandora shell n
- any marine bivalve of the genus Pandora, having a scimitar-shaped shell; also, the shell
- 1 panic adj
- [F panique, fr. Gk panikos, lit., of Pan, fr. Pan, a Greek god of pastures, flocks, and shepherds usu. represented as having the legs, horns, and ears of a goat] 1 : of, relating to, or resembling the mental or emotional state believed induced by the god Pan 2 : of, relating to, or arising from a panic
- 2 panic n
- 1 : a sudden overpowering fright 2 : a sudden widespread fright concerning financial affairs that results in a depression of values caused by extreme measures for protection 3 : one that is very funny
- 3 panic v
- 1 : to affect with panic 2 : to produce demonstrative appreciation on the part of 3 : to be affected with panic
- pan-pipe n
- [Pan, its traditional inventor] : a primitive wind instrument consisting of a series of short vertical pipes of graduated lengths bound together with the mouthpiece in an even row
- pantheon n
- [ME Panteon, a temple at Rome, fr. L Pantheon, fr. Gk pantheion temple of all the gods] 1 : a temple dedicated to all the gods 2 : a building serving as a burial place of or containing memorials to the famous dead of a nation 3 : the gods of a people 4 : a group of illustrious people
- 1 Paphian n
- [L paphius, fr. Gk paphios, fr. Paphos, ancient city of Cyprus that was the center of the worship of Aphrodite, Greek goddess of love] : prostitute
- 2 Paphian adj
- of or relating to illicit love : wanton
- Parcae n
- [L Parcae, the Fates] : fate
- Parnassian adj
- [L parnassius of Parnassus, fr. Gk parnasios, fr. Parnasos Parnassus, mountain in Greece sacred to the god Apollo and the Muses] : of or relating to poetry
- Parthenon n
- [L, fr. Gk Parthenon] : the temple of Athena built on the acropolis at Athens
- Pasiphae n
- [fr. Gk, the wife of Minos, mother of Ariadne, and mother of the Minotaur by the Cretan bull] : one of the many moons of Jupiter

- Pegasus n
- [L, fr. Gk Pegasos a winged horse that causes the stream Hippocrene to spring from Mount Hellison with a blow of his hoof] 1 : poetic inspiration 2 : a northern constellation near the vernal equinoctial point
- Penelope n
- [fr. Gk, the wife of Odysseus who remained faithful to him throughout his absence at Troy, despite having many suitors] : a girl's given name
- peony n
- [ME piony, fr. MF pioine, fr. L paeonia, fr. Gk paionia, fr. Paion Paeon, physician of the gods] : any of a genus (Paeonia of the family Paeoniaccae) of chiefly Eurasian plants with large often double flowers
- Perseid n
- [L Perseus; fr. their appearing to radiate from a point in Perseus] : any of a group of meteors that appear annually about August 11

- Perseus n
- [L, fr. Gk Perseus, son of Zeus and Danae and slayer of Medusa] : a northern constellation between Taurus and Cassiopeia
- phaeton n
- [L, fr. Gk Phaethon, a son of Helios who drives his father's sun-chariot through the sky but loses control and is struck down by a thunderbolt of Zeus] 1 : any of a various light four-wheeled horse-drawn vehicles 2 : touring car
- philomel n
- [L Philomela, fr. Gk Philomele, an Athenian princess who was raped by her brother-in-law Tereus and, after having had her tongue cut out by him, was later avenged and transformed into a nightingale] : nightingale
- phlegethon n
- [L. fr. Gk Phlegothon, a river of fire in Hades] : a stream of fire or fiery light
- Phobos n
- [fr. L Phobus, a son and attendant of Ares in Roman mythology] : one of two satellites of Mars
- 1 phoebe n
- [L, fr. Gk Phoibe, Artemis] : any of a genus (Sayornis) of American flycatchers
- 2 Phoebe n
- 1 : one of the nine satellites of Saturn 2 : the moon personified, in literature 3 : a girl's given name
- Phoebus n
- [L, fr. Gk Phoibus, Apollo] Literary : the sun
- 1 phoenix n
- [L, fr. Gk phoinix a mythical bird, Phoenician; fr. Phoenix, the brother of Cadmus and Europa and eponymous ancestor of the Phoenicians] 1 : a mythical bird of great beauty, the only one of its kind, fabled to live 500 or 600 years, to burn itself on a funeral pile, and to rise from its ashes in the freshness of youth and live through another cycle of years 2 : a person or thing of peerless beauty or excellence 3 : a person or thing that has become renewed or restored after suffering calamity
- 2 Phoenix trademark
- a photographic technology company
- pierian adj
- [L Pierius, of or relating to the region of Pieria in ancient Macedonia where the Muses were once worshipped] 1 : of or relating to learning poetry 2 : of or pertaining to inspiration
- Pierian Spring n
- a fountain in Pieria, sacred to the Muses and supposedly conferring inspiration or learning on anyone who drank from it
- pierid n
- [fr. NL Pieridae, family of butterflies named for nine maidens who challenged the Muses to a singing contest and lost, and were transformed into magpies for insulting the victors, fr. Gk Pierides Muses] : a pierid butterfly
- pleiad n
- [fr. F Pleiade, fr. L, fr. Gk Pleiad-, Pleias, fr. sing. of Pleiades, the seven daughters of Atlas turned into a group of stars in Greek mythology] : a group of usu. seven illustrious or brilliant persons or things
- Pleiades n
- a conspicuous cluster of stars in the constellation Taurus that includes six stars in the form of a very small dipper
- Pluto n
- [L Pluton-, Pluto, fr. Gk Plouton Pluto, the Greek god of the underworld] : the planet with the farthest mean distance from the sun
- plutonian adj
- of, relating to, or characteristic of Pluto or the lower world
- plutonic adj
- formed by solidification of magma deep within the earth and crystalline throughout
- plutonium n
- a radioactive element
- priapic adj
- [L priapus lecher, fr. Priapus, a Greek and Roman god of gardens and male generative power] 1 : phallic 2 : relating to or preoccupied with virility
- procrustean adj
- [L, fr. Gk Prokroustes Procrustes, a villainous son of Poseidon in Greek mythology who forces travelers to fit into his bed by stretching their bodies or cutting off their legs] : marked by arbitrary often ruthless disregard of individual differences or special circumstances
- procrustean bed n
- a scheme or pattern into which someone or something is arbitrarily forced
- Promethea moth n
- [NL, fem. of L Prometheus Prometheus, a Titan who is chained and tortured by Zeus for stealing fire from Heaven and giving it to mankind] : a silkworm moth, Callosamia promethea, having reddish-brown wings, the larvae of which feed on spicebush and other lauraceous plants
- promethean adj
- daringly original or creative
- Prometheus n
- a satellite of the planet Saturn
- promethium n
- [NL, fr. L Prometheus] : a radioactive metallic element
- protea n
- [NL, fr. L Proteus, fr. Gk Proteus Proteus, a sea god in Greek mythology noted for his ability to assume different forms and to prophesy] : any of a genus (Protea of the family Proteacaea, the protea family) of evergreen shrubs often grown for their showy bracts and dense flower heads
- protean n
- 1 : of or resembling Proteus in having a varied nature or ability to assume different shapes 2 : displaying great diversity or variety
- 1 proteus n
- a person or thing that readily changes appearance, character, principles, etc.
- 2 Proteus n
- 1 : a satellite of Neptune 2 : any of a genus (Proteus) of aerobic usu. motile enterobacteria
- psyche n
- [L, fr. Gk psyche soul, fr. Psyche Psyche, a princess loved by Cupid] 1 a : soul, self b : mind
- python n
- [L, monstrous serpent killed by Apollo, fr. Gk Python, fr. Pytho Delphi, site of Apollo's oracle] : any of various large constricting snakes
- pythoness n
- [ME Phitonesse, fr. MF pithonisse, fr. LL pythonissa, fr. Gk Python, spirit of divination, fr. Pytho Delphi] : a woman who practices divination, as would a prophetic priestess of Apollo
- 1 pythonic adj
- prophetic, oracular
- 2 pythonic adj
- 1 : of or pertaining to pythons 2 : pythonlike 3 : gigantic or monstrous
