Nouns starting with P

• paradise tree — Noun – English ～ medium to large tree of tropical North and South America having odd-pinnate leaves and long panicles of small pale yellow flowers followed by scarlet fruits
• papaya tree — Noun – English ～ tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit
• papaw tree — Noun – English ～ small tree native to the eastern United States having oblong leaves and fleshy fruit
• Para rubber tree — Noun – English ～ deciduous tree of the Amazon and Orinoco Rivers having leathery leaves and fragrant yellow-white flowers; it yields a milky juice that is the chief source of commercial rubber
• palm tree — Noun – English ～ any plant of the family Palmae having an unbranched trunk crowned by large pinnate or palmate leaves
• pagoda tree — Noun – English ～ frangipani of India having an erect habit and conical form; grown in temple gardens
• Panama tree — Noun – English ～ large deciduous tree native to Panama and from which the country takes its name; having densely leafy crown and naked trunk
• Panama redwood tree — Noun – English ～ large erect shrub of Colombia having large odd-pinnate leaves with large leaflets and axillary racemes of fragrant yellow flowers
• pagoda tree — Noun – English ～ tall sparingly branched conical tree having large fragrant yellow flowers with white centers
• Pacific tree toad — Noun – English ～ the most commonly heard frog on the Pacific coast of America
• prairie bird's-foot trefoil — Noun – English ～ North American annual with red or rose-colored flowers
• prairie trefoil — Noun – English ～ North American annual with red or rose-colored flowers
• pony-trekking — Noun – English ～ a sport in which people ride across country on ponies
• Populus tremula — Noun – English ～ Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa
• Populus tremuloides — Noun – English ～ slender aspen native to North America
• paroxysmal trepidant abasia — Noun – English ～ abasia related to spasticity of the legs
• Poronotus triacanthus — Noun – English ～ small food fish of Atlantic coast
• preclinical trial — Noun – English ～ a laboratory test of a new drug or a new invasive medical device on animal subjects; conducted to gather evidence justifying a clinical trial
• phase III clinical trial — Noun – English ～ a large clinical trial of a treatment or drug that in phase I and phase II has been shown to be efficacious with tolerable side effects; after successful conclusion of these clinical trials it will receive formal approval from the FDA
• phase II clinical trial — Noun – English ～ a clinical trial on more persons than in phase I; intended to evaluate the efficacy of a treatment for the condition it is intended to treat; possible side effects are monitored

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