Words in english starting with P

• 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
• phase IV clinical trial — Noun – English ～ sometimes the FDA approves a drug for general use but requires the manufacturer to continue to monitor its effects; during this phase the drug may be tried on slightly different patient populations than those studied in earlier trials
• phase I clinical trial — Noun – English ～ a clinical trial on a few persons to determine the safety of a new drug or invasive medical device; for drugs, dosage or toxicity limits should be obtained
• Populus trichocarpa — Noun – English ～ cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath
• Phyllocladus trichomanoides — Noun – English ～ medium tall celery pine of New Zealand
• play a trick on — Verb – English ～ deceive somebody; "We tricked the teacher into thinking that class would be cancelled next week"
• play tricks — Verb – English ～ deceive somebody; "We tricked the teacher into thinking that class would be cancelled next week"
• Parthenocissus tricuspidata — Noun – English ～ Asiatic vine with three-lobed leaves and purple berries
• Poncirus trifoliata — Noun – English ～ small fast-growing spiny deciduous Chinese orange tree bearing sweetly scented flowers and decorative but inedible fruit: used as a stock in grafting and for hedges
• plutonium trigger — Noun – English ～ a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives
• purple trillium — Noun – English ～ trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirth
• prairie trillium — Noun – English ～ trillium of central United States having dark purple sessile flowers
• Prunus triloba — Noun – English ～ deciduous Chinese shrub or small tree with often trilobed leaves grown for its pink-white flowers
• Platymiscium trinitatis — Noun – English ～ large tree of Trinidad and Guyana having odd-pinnate leaves and violet-scented axillary racemes of yellow flowers and long smooth pods; grown as a specimen in parks and large gardens
• pleasure trip — Noun – English ～ a journey taken for pleasure; "many summer excursions to the shore"; "it was merely a pleasure trip"; "after cautious sashays into the field"
• power trip — Noun – English ～ (slang) a self-aggrandizing action undertaken simply for the pleasure of exercising control over other people
• Pacific tripletail — Noun – English ～ tripletail found in the Pacific
• Pan troglodytes schweinfurthii — Noun – English ～ long-haired chimpanzees of east-central Africa; closely related to the central chimpanzees

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