Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z pyroquilon A particular fungicide. pyroretin A resinous form of asphalt pyroscope An early form of pyrometer used to measure high temperatures. pyrosequence To produce by pyrosequencing. pyrosequencer A device used in pyrosequencing. pyrosequencing A technique used to sequence DNA using chemiluminescent enzymatic reactions. pyrosignal A signal produced by a thermal-imaging camera, especially by a pyrovidicon system pyrosilicate The silicate anion Si₂O₇⁶⁻; any compound containing this anion pyrosilver electroplated ware in which the silver is made to sink into the pores of the plated baser metal by the action of heat pyrosis A burning sensation in the chest due to reflux of stomach contents in the esophagus. pyrosmalite A mineral, usually of a pale brown or grey-greenish colour, consisting chiefly of the hydrous silicate of iron and manganese. pyrosoda A mixture of pyrogallic acid and soda used as a photographic developer. pyrosol A method to apply a thin coating by pyrolysis of an aerosol. pyrosome Any of several pelagic colonial tunicates, of the genus Pyrosoma, found in tropical waters. pyrosophy pyrology pyrosphere The zone of igneous activity and lava formation, situated between the lithosphere and barysphere. pyrostat A thermostat designed to operate at high temperatures. pyrostephid Any siphonophore of the family Pyrostephidae pyrostilpnite A certain monoclinic form of pyrargyrite. pyrosulfate Any salt of pyrosulfuric acid. pyrosulfite metabisulfite pyrosulfuric of, or relating to pyrosulfuric acid or its derivatives pyrosulfuryl A divalent group -S₂O₅- pyrosulphite The anion S₂O₅²⁻; any salt containing this anion pyrosynthesis synthesis by the application of heat pyrosynthetic Relating to pyrosynthesis pyrotag A sequence derived from 454 pyrosequencing of PCR-based small subunit ribosomal RNA amplicons. pyrotagged sequenced by means of pyrotagging pyrotagging sequencing by means of pyrotags pyrotartareous pyrotartaric pyrotartaric of, or relating to pyrotartaric acid or its derivatives pyrotartranil The compound 1-phenyl-3-methyl-2,5-pyrrolidinedione formed by heating aniline with pyrotartaric acid pyrotartrate Any salt or ester of pyrotartaric acid. pyrotartrimide The imide of pyrotartaric acid pyrotechnian pyrotechnician pyrotechnic Of or relating to fireworks. pyrotechnical Of or pertaining to pyrotechnics pyrotechnically By means of pyrotechnics. pyrotechnician A person who designs or organises pyrotechnics. pyrotechnics The art and technology of fireworks and related military applications. pyrotechnist A pyrotechnician: person skilled in the manufacture or setting off of fireworks and firework displays. pyrotechnologic pyrotechnological pyrotechnological Relating to pyrotechnology pyrotechnology The technology of pyrotechnics pyrotechny The manufacture and use of fireworks. pyrotect pyrotechnist pyroteuthid Any member of the Pyroteuthidae. pyrotheology An interpretation that views faith as a particular way of engaging with the world rather than a set of beliefs about the world. pyrotherapeutic Relating to pyrotherapy. pyrotherapy The therapeutic use of fever (high body temperature) pyrothere An extinct South American mammal, of the order †Pyrotheria, that resembled elephants. pyrotheriid Any member of the Pyrotheriidae. pyrotic Caustic. pyrotol An explosive usually used in combination with dynamite. pyrotoxin Any of several pyrogenic bacterial toxins. pyrotritaric Only used in pyrotritaric acid pyrotritartaric Only used in pyrotritartaric acid pyrotron A magnetic mirror. pyrotungstic of, or relating to pyrotungstic acid or its derivatives pyrouric cyanuric pyrovalerone A psychoactive drug, (RS)-1-(4-methylphenyl)-2-(1-pyrrolidinyl)pentan-1-one, used to treat chronic fatigue and as an anorectic. It belongs to the family of substituted cathinones. pyrovanadic of, or relating to pyrovanadic acid or its derivatives pyrovidicon A pyroelectric vidicon. pyroxamide The carboxylic acid derivative of pyridine N'-hydroxy-N-pyridin-3-yloctanediamide pyroxamine A chemical analog of diphenylpyraline. pyroxanthin A yellow, crystalline substance obtained from creosote etc; it seems to be a polycyclic aromatic hydrocarbon. pyroxanthogen The component of wood tar from which pyroxanthin is obtained pyroxasulfone The pesticide 3-[[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazol-4-yl]methylsulfonyl]-5,5-dimethyl-4H-1,2-oxazole pyroxene Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium. pyroxenic of, relating to, or containing pyroxene pyroxenite A heavy, dark igneous rock consisting mostly of pyroxene minerals with smaller amounts of olivine and hornblende. pyroxenitic Of or relating to pyroxenite. pyroxenoid any of a large group of minerals physically resembling pyroxene pyroxferroite A yellowish silicate of the pyroxene group with a triclinic crystal structure. pyroxmangite A triclinic-pinacoidal mineral containing iron, manganese, oxygen, and silicon. pyroxychlor A particular fungicide. pyroxyfur A particular fungicide. pyroxylic Created by the destructive distillation of wood. pyroxylin A highly inflammable form of nitrocellulose; used in the manufacture of collodion and lacquers. pyrozone A preparation of ether peroxide used as a mouthwash. pyrraline a heterocyclic aldehyde and primary alcohol with formal name 5-(hydroxymethyl)-1H-pyrrole-2-carbaldehyde pyrrazolooxadiazepine Any of a class of organic compound composed of a pyrrole ring fused to an oxadiazepine system Pyrrha The wife of Deucalion. pyrrhic Of or characterized by pyrrhics (metrical feet with two short syllables). pyrrhical pyrrhic pyrrhichius pyrrhic pyrrhicist One who danced the Pyrrhichios. pyrrhite A form of pyrochlore pyrrhoarsenite A form of berzeliite containing some antimony pyrrhocorid Any member of the family Pyrrhocoridae. pyrrholite An aluminosilicate pinite of calcium and potassium Pyrrhonean Of or relating to Pyrrhonism. Pyrrhonian Characteristic of the Greek philosopher Pyrrho Pyrrhonic Of or relating to Pyrrhonism. Pyrrhonical Of or relating to Pyrrhonism. Pyrrhonism The system of skeptical philosophy established by Pyrrho of Elis, centred on the idea that nothing can be known for certain; widespread skepticism, universal doubt. Pyrrhonist A follower of Pyrrho or Pyrrhonism; a philosophical skeptic. Pyrrhonistic Of or relating to Pyrrhonism. pyrrhonize To be sceptical; to practise Pyrrhonism. pyrrhosiderite A form of lepidocrocite pyrrhotine pyrrhotite pyrrhotite A weakly magnetic ferrous sulfide mineral, FeS. pyrrhotitic of, relating to, or consisting of pyrrhotite pyrrhous reddish; ruddy pyrrhoxanthininol A particular carotenoid. pyrrhuline Relating to bullfinches of the genus Pyrrhula. pyrrhuloxia Cardinalis sinuatus a North American bird with grey and red plumage. Pyrrhus A male given name from Ancient Greek. pyrrobutamine A particular antihistamine drug. pyrrocaine An anesthetic drug. pyrrocidine Any of a group of bioactive natural products. pyrroindomycin Any of a group of antibiotics that have a spirotetramate structure pyrrole Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, C₄H₅N. pyrrolic Pertaining to, or having a structure based on, a pyrrole pyrrolide The univalent anion derived from pyrrolidine by loss of a hydrogen ion pyrrolidine Any of a class of heterocyclic amines having a saturated five-membered ring; especially the parent compound of this class, C₄H₉N. pyrrolidinedione A derivative of pyrrolidine having two carbonyl groups pyrrolidinium A cation formed by protonation of a pyrrolidine pyrrolidinone Any heterocyclic ketone derived from pyrrolidine, but especially any 2-pyrrolidinone (a form of cyclic amide) pyrrolidinopentiophenone Any pyrrolidine derivative of pentiophenone, but especially the α- isomer which is the synthetic stimulant flikka pyrrolidinophenone Any of a class of recreational designer drugs with psychostimulant effects. pyrrolidinyl A radical derived from pyrrolidine pyrrolidinyloxy The N-oxygen free radical derived from pyrrolidine pyrrolidinylthiambutene An opioid analgesic drug from the thiambutene family. pyrrolidone any of a class of heterocyclic ketones derived from a pyrrolidine; especially 2-pyrrolidone, the simplest γ-lactam pyrrolidonyl A univalent radical derived from pyrrolidone pyrroline Any of three isomeric monounsaturated heterocycles having a five-membered ring and one nitrogen atom C₄H₇N; any derivative of these compounds pyrrolinone A cyclic ketone formally derived from 2-pyrroline pyrrolizidine Any of a class of alkaloids, found in many plants, that are hepatotoxic. pyrrolizine A bicyclic heterocycle consisting of a pyrrole ring fused to that of pyrrolidine pyrrolnitrin An antifungal antibiotic. pyrrolo A functional group consisting of a pyrrole ring fused onto another part of the molecule. pyrrolobenzodiazepine A class of compounds with antibiotic and anti-tumor properties. pyrrolocarbazole Any of several isomeric tetracyclic heterocycles composed of a pyrrole ring fused to a carbazole moiety pyrroloindole A tricyclic aromatic heterocycle composed of a pyrrole ring fused to one of indole pyrroloindoline Any of several isomeric tricyclic heterocycles composed of a pyrrole ring fused to indoline pyrrolone Any heterocyclic ketone derived from pyrrole pyrrolopyridine Any heterobicyclic compound containing fused pyrrole and pyridine rings pyrroloquinoline Any of a family of compounds containing a pyrrole ring fused to the benzene ring of a quinoline pyrroloquinolinequinone Any quinone derived from a pyrroloquinoline; the third known redox cofactor in bacteria, after nicotinamide and flavin. pyrrolostatin A lipid peroxidation inhibitor with the molecular formula C₁₅H₂₁N_(O2). pyrrolotriazine An organic compound composed of a pyrrole ring fused to a triazine ring, or a derivative thereof. pyrrolyl A radical derived from pyrrole pyrrolysine An amino acid found in methanogenic bacteria. pyrrolysyl A univalent radical derived from pyrrolysine pyrromethene dipyrrin pyrromycin An antibiotic obtained from bohemic acid by chromatographic separation. pyrrothine Any of a class of antibiotics derived from dithiolopyrrolone pyrryl Any of three univalent radicals, C₄H₄N, formally derived from pyrrole by the loss of a hydrogen atom. Pyrton A village and civil parish in South Oxfordshire district, Oxfordshire, England (OS grid ref SU6895).