| ornithine | (noun) an amino acid that does not occur in proteins but is important in the formation of urea | - |
|---|
| orphenadrine | (noun) a skeletal muscle relaxant (trade name Norflex) used to treat severe muscle strain and Parkinsonism | Synonyms: Norflex |
|---|
| orpine | (noun) perennial northern temperate plant with toothed leaves and heads of small purplish-white flowers | Synonyms: live-forever, livelong, orpin, Sedum telephium |
|---|
| oscine | (noun) passerine bird having specialized vocal apparatus | Synonyms: oscine bird |
|---|
| outline | (noun) a schematic or preliminary plan | Synonyms: schema, scheme |
|---|
| (noun) a sketchy summary of the main points of an argument or theory | Synonyms: abstract, precis, synopsis |
| (noun) the line that appears to bound an object | Synonyms: lineation |
| overtone | (noun) a harmonic with a frequency that is a multiple of the fundamental frequency | Synonyms: partial, partial tone |
|---|
| (noun) (usually plural) an ulterior implicit meaning or quality | - |
| oxyacetylene | (noun) a mixture of oxygen and acetylene; used to create high temperatures for cutting or welding metals | - |
|---|
| oxybenzene | (noun) a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally | Synonyms: carbolic acid, hydroxybenzene, phenol, phenylic acid |
|---|
| oxyphenbutazone | (noun) an anti-inflammatory drug (trade name Tandearil) used to treat arthritis and bursitis | Synonyms: Tandearil |
|---|
| oxyphencyclimine | (noun) an anticholinergic drug (trade name Daricon) used in treating peptic ulcers | Synonyms: Daricon |
|---|
| oxytetracycline | (noun) a yellow crystalline antibiotic (trademark Terramycin) obtained from a soil actinomycete; used to treat various bacterial and rickettsial infections | Synonyms: hydroxytetracycline, oxytetracycline hydrochloride, Terramycin |
|---|
| oxytone | (noun) word having stress or an acute accent on the last syllable | - |
|---|
| ozone | (noun) a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation) | - |
|---|
| pachytene | (noun) the third stage of the prophase of meiosis | - |
|---|
| padrone | (noun) an owner or proprietor of an inn in Italy | - |
|---|
| (noun) an employer who exploits Italian immigrants in the U.S. | - |
| palatine | (noun) either of two irregularly shaped bones that form the back of the hard palate and helps to form the nasal cavity and the floor of the orbits | Synonyms: os palatinum, palatine bone |
|---|
| (noun) (Middle Ages) the lord of a palatinate who exercised sovereign powers over his lands | Synonyms: palsgrave |
| (noun) any of various important officials in ancient Rome | - |
| pallone | (noun) an Italian game similar to tennis | - |
|---|
| pane | (noun) sheet glass cut in shapes for windows or doors | Synonyms: pane of glass, window glass |
|---|
| (noun) a panel or section of panels in a wall or door | Synonyms: paneling, panelling |
| (noun) street name for lysergic acid diethylamide | Synonyms: acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, superman, window pane, Zen |
| papaverine | (noun) an alkaloid medicine (trade name Kavrin) obtained from opium; used to relax smooth muscles; it is nonaddictive | Synonyms: Kavrin |
|---|
| parathormone | (noun) hormone synthesized and released into the blood stream by the parathyroid glands; regulates phosphorus and calcium in the body and functions in neuromuscular excitation and blood clotting | Synonyms: parathyroid hormone |
|---|
| paroxetine | (noun) a selective-serotonin reuptake inhibitor commonly prescribed as an antidepressant (trade name Paxil) | Synonyms: Paxil |
|---|
| paroxytone | (noun) word having stress or acute accent on the next to last syllable | - |
|---|
| passerine | (noun) perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless | Synonyms: passeriform bird |
|---|
| patronne | (noun) a woman who is a patron or the wife of a patron | Synonyms: patroness |
|---|
| pavane | (noun) a stately court dance of the 16th and 17th centuries | Synonyms: pavan |
|---|
| (noun) music composed for dancing the pavane | Synonyms: pavan |
| peneplane | (noun) a more or less level land surface representing an advanced stage of erosion undisturbed by crustal movements | Synonyms: peneplain |
|---|
| penicillamine | (noun) a drug (trade name Cuprimine) used to treat heavy metal poisoning and Wilson's disease and severe arthritis | Synonyms: Cuprimine |
|---|
| penne | (noun) pasta in short tubes with diagonally cut ends | - |
|---|
| pentatone | (noun) a gapped scale with five notes; usually the fourth and seventh notes of the diatonic scale are omitted | Synonyms: pentatonic scale |
|---|
| pentazocine | (noun) analgesic drug (trade name Talwin) that is less addictive than morphine | Synonyms: Talwin |
|---|
| pentoxifylline | (noun) a drug (trade name Trental) used to treat claudication; believed to increase the flexibility of red blood cells so they can flow through the blood vessels to the legs and feet | Synonyms: Trental |
|---|
| peptone | (noun) any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids | - |
|---|
| perchloromethane | (noun) a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined | Synonyms: carbon tet, carbon tetrachloride, tetrachloromethane |
|---|
| peregrine | (noun) a widely distributed falcon formerly used in falconry | Synonyms: Falco peregrinus, peregrine falcon |
|---|
| perigone | (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: chlamys, floral envelope, perianth, perigonium |
|---|
| perilune | (noun) periapsis in orbit around the moon | Synonyms: periselene |
|---|
| periselene | (noun) periapsis in orbit around the moon | Synonyms: perilune |
|---|
| perphenazine | (noun) tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults | Synonyms: Triavil |
|---|
| phenazopyridine | (noun) analgesic (trade name Pyridium) used to treat urinary tract infections | Synonyms: Pyridium |
|---|
| phencyclidine | (noun) a drug used as an anesthetic by veterinarians; illicitly taken (originally in the form of powder or `dust') for its effects as a hallucinogen | Synonyms: angel dust, PCP, phencyclidine hydrochloride |
|---|
| phenelzine | (noun) monoamine oxidase inhibitor (trade name Nardil) used to treat clinical depression | Synonyms: Nardil |
|---|
| pheniramine | (noun) an antihistamine used in preparations to treat allergies and respiratory infections; used to treat rhinitis and skin rashes and pruritus | - |
|---|
| phenobarbitone | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbital, purple heart, sodium thiopental |
|---|
| phenothiazine | (noun) a compound used primarily in veterinary medicine to rid farm animals of internal parasites | Synonyms: thiodiphenylamine |
|---|
| phentolamine | (noun) a virility drug (trade name Vasomax) to treat erectile dysfunction in men | Synonyms: Vasomax |
|---|
| phenylalanine | (noun) an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body | - |
|---|
| phenylamine | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aminobenzine, aniline, aniline oil |
|---|
| phenylbutazone | (noun) anti-inflammatory drug (trade name Butazolidin) | Synonyms: Butazolidin |
|---|
| phenylephrine | (noun) a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion | - |
|---|
| phenylethylene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: cinnamene, styrene, vinylbenzene |
|---|
| phenylpropanolamine | (noun) an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections | - |
|---|
| phenyltoloxamine | (noun) antihistamine included in some preparations used to treat coughing and nasal congestion | - |
|---|
| pheromone | (noun) a chemical substance secreted externally by some animals (especially insects) that influences the physiology or behavior of other animals of the same species | - |
|---|
| philhellene | (noun) an admirer of Greece and everything Greek | Synonyms: Graecophile, philhellenist |
|---|
| philistine | (noun) a person who is uninterested in intellectual pursuits | Synonyms: anti-intellectual, lowbrow |
|---|
| phone | (noun) electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds | Synonyms: telephone, telephone set |
|---|
| (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, earpiece, headphone |
| (noun) (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language | Synonyms: sound, speech sound |
| phosgene | (noun) a colorless poisonous gas that smells like new-mown hay; used in chemical warfare | - |
|---|
| phosphine | (noun) a colorless gas with a strong fishy smell; used as a pesticide | - |
|---|
| phosphocreatine | (noun) an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction | Synonyms: creatine phosphate, creatine phosphoric acid |
|---|
| phragmacone | (noun) the thin conical chambered internal shell (either straight or curved) of a belemnite | Synonyms: phragmocone |
|---|
| phragmocone | (noun) the thin conical chambered internal shell (either straight or curved) of a belemnite | Synonyms: phragmacone |
|---|
| phylloquinone | (noun) a form of vitamin K, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent | Synonyms: phytonadione, vitamin K1 |
|---|
| physostigmine | (noun) used in treatment of Alzheimer's disease and glaucoma | - |
|---|
| phytohormone | (noun) (botany) a plant product that acts like a hormone | Synonyms: growth regulator, plant hormone |
|---|
| phytonadione | (noun) a form of vitamin K, based on 2-methyl-1,4-naphthoquinone, with a 3-phytyl substituent | Synonyms: phylloquinone, vitamin K1 |
|---|
| pilocarpine | (noun) cholinergic alkaloid used in eyedrops to treat glaucoma | - |
|---|
| pine | (noun) a coniferous tree | Synonyms: pine tree, true pine |
|---|
| (noun) straight-grained durable and often resinous white to yellowish timber of any of numerous trees of the genus Pinus | - |
| pinecone | (noun) the seed-producing cone of a pine tree | - |
|---|
| pipeline | (noun) a pipe used to transport liquids or gases | Synonyms: line |
|---|
| (noun) gossip spread by spoken communication | Synonyms: grapevine, word of mouth |
| piperazine | (noun) vermifuge used to treat infestations by roundworms or pinworms | - |
|---|
| piperine | (noun) derived from pepper (especially black pepper); source of the hotness of black and white pepper | Synonyms: piperin |
|---|
| piperocaine | (noun) a compound used in the form of its hydrochloride as a local or spinal anesthetic | Synonyms: Metycaine, piperocaine hydrochloride |
|---|
| pistonphone | (noun) an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. | - |
|---|
| pitchstone | (noun) dark acid granitic glass | - |
|---|
| plane | (noun) a carpenter's hand tool with an adjustable blade for smoothing or shaping wood | Synonyms: carpenter's plane, woodworking plane |
|---|
| (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: aeroplane, airplane |
| (noun) a power tool for smoothing or shaping wood | Synonyms: planer, planing machine |
| (noun) (mathematics) an unbounded two-dimensional shape | Synonyms: sheet |
| (noun) a level of existence or development | - |
| platyrrhine | (noun) hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails | Synonyms: New World monkey, platyrrhinian |
|---|
| polybutene | (noun) a polymer of butylene; used in lubricants and synthetic rubber | Synonyms: polybutylene |
|---|
| polybutylene | (noun) a polymer of butylene; used in lubricants and synthetic rubber | Synonyms: polybutene |
|---|
| polyethylene | (noun) a lightweight thermoplastic; used especially in packaging and insulation | Synonyms: polythene |
|---|
| polygene | (noun) a gene that by itself has little effect on the phenotype but which can act together with others to produce observable variations | - |
|---|
| polyphone | (noun) a letter that has two or more pronunciations | Synonyms: polyphonic letter |
|---|
| polypropene | (noun) a polymer of propylene used as a thermoplastic molding material | Synonyms: polypropylene |
|---|
| polypropylene | (noun) a polymer of propylene used as a thermoplastic molding material | Synonyms: polypropene |
|---|
| polystyrene | (noun) a polymer of styrene; a rigid transparent thermoplastic | - |
|---|
| polytetrafluoroethylene | (noun) a material used to coat cooking utensils and in industrial applications where sticking is to be avoided | Synonyms: Teflon |
|---|
| polythene | (noun) a lightweight thermoplastic; used especially in packaging and insulation | Synonyms: polyethylene |
|---|
| polyurethane | (noun) any of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives or plastics or paints or rubber | Synonyms: polyurethan |
|---|
| pone | (noun) cornbread often made without milk or eggs and baked or fried (southern) | Synonyms: cornpone |
|---|
| porcupine | (noun) relatively large rodents with sharp erectile bristles mingled with the fur | Synonyms: hedgehog |
|---|
| poutine | (noun) a Canadian dish made with french fries and cheese curds topped with a light brown gravy | - |
|---|
| praline | (noun) cookie-sized candy made of brown sugar and butter and pecans | - |
|---|
| prednisolone | (noun) a glucocorticoid (trade names Pediapred or Prelone) used to treat inflammatory conditions | Synonyms: Pediapred, Prelone |
|---|
| prednisone | (noun) a dehydrogenated analogue of cortisol (trade names Orasone or Deltasone or Liquid Pred or Meticorten); used as an anti-inflammatory drug in the treatment of arthritis and as an immunosuppressant | Synonyms: Deltasone, Liquid Pred, Meticorten, Orasone |
|---|
| primaquine | (noun) synthetic antimalarial drug | - |
|---|
| primidone | (noun) an anticonvulsant (trade name Mysoline) used to treat grand mal seizures and essential tremor | Synonyms: Mysoline |
|---|
| procaine | (noun) a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine | Synonyms: Ethocaine |
|---|
| procarbazine | (noun) an antineoplastic drug used to treat Hodgkin's disease | - |
|---|
| prochlorperazine | (noun) antipsychotic and antiemetic drug used to treat schizophrenia and to combat nausea and vomiting | - |
|---|
| procyclidine | (noun) drug (trade name Kemadrin) used to reduce tremors in Parkinsonism | Synonyms: Kemadrin |
|---|
| progesterone | (noun) a steroid hormone (trade name Lipo-Lutin) produced in the ovary; prepares and maintains the uterus for pregnancy | Synonyms: Lipo-Lutin |
|---|