Nouns starting with P

• Pterosauria — Noun – English ～ extinct flying reptiles: pterosaurs
• Pterospermum acerifolium — Noun – English ～ Indian tree having fragrant nocturnal white flowers and yielding a reddish wood used for planking; often grown as an ornamental or shade tree
• Pterospermum — Noun – English ～ genus of tropical Asian trees and shrubs
• Pterostylis — Noun – English ～ genus of terrestrial orchids of Australia and New Zealand and western Pacific
• pteroylglutamic acid — Noun – English ～ a B vitamin that is essential for cell growth and reproduction
• pteroylmonoglutamic acid — Noun – English ～ a B vitamin that is essential for cell growth and reproduction
• pterygium — Noun – English ～ either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula
• pterygoid muscle — Noun – English ～ muscle descending from the sphenoid bone to the lower jaw
• pterygoid process — Noun – English ～ two bony processes descending from the body of the sphenoid bone
• pterygoid plexus — Noun – English ～ a plexus of veins draining the region of the pterygoid muscles and draining into the internal maxillary and anterior facial veins
• Ptilocercus — Noun – English ～ pentails
• Ptilocrinus — Noun – English ～ sea lilies
• ptilonorhynchidae — Noun – English ～ bowerbirds
• ptilonorhynchus — Noun – English ～ type genus of the Ptilonorhynchidae
• Ptloris — Noun – English ～ a genus of Paradisaeidae
• Ptloris paradisea — Noun – English ～ velvety black Australian bird of paradise with green and purple iridescence on head and tail
• pto — Noun – English ～ a device that transfers power from an engine (as in a tractor or other motor vehicle) to another piece of equipment (as to a pump or jackhammer)
• Ptolemaic dynasty — Noun – English ～ an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra
• Ptolemy II — Noun – English ～ son of Ptolemy I and king of Egypt who was said to be responsible for the Septuagint (circa 309-247 BC)
• ptolemy — Noun – English ～ Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance

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