PyramulA locality in the Mid-Western council area, eastern New South Wales, Australia.
Pyramusa Babylonian lover in the tragedy of Pyramus and Thisbe
pyranAny of a class of unsaturated heterocyclic compounds containing a ring of five carbon atoms, an oxygen atom and two double bonds; especially the simplest one, C₅H₆O.
pyrargyriteA sulfosalt mineral used as a silver ore; it is dark red or black in color with a metallic adamantine luster, a sulfide of antimony and silver, Ag₃SbS₃, and occurs in rhombohedral crystals.
pyrazoleA heterocyclic organic compound containing two nitrogen atoms next to each others in a five-membered ring, called 1,2-diazole in IUPAC nomenclature.
pyrazoleamideAny amide containing a pyrazole ring attached to the carbonyl group; several are antimalarial drugs
pyrazolicOf, pertaining to or composed of pyrazole moieties
pyrazolideThe anion produced when a hydrogen ion is removed from pyrazole.
pyrazolidineA saturated five-membered heterocycle containing three carbon atoms and two nitrogen atoms
pyrazolineA five-membered heterocycle containing three carbon atoms, two adjacent nitrogen atoms and one double bond
pyrazolinoneA derivative of a pyrazoline that has a carbonyl group in the ring
pyrazoloanthroneA tetracyclic heterocyclic ketone composed of a pyrazole ring fused to an anthrone
pyrazoloneA five-membered unsaturated heterocyclic ketone (or lactam), derived from pyrazole, that is the basis of several pharmaceuticals
pyrazolopyridineAny of a class of anxiolytic drugs that act as positive allosteric modulators of the GABA_A receptor at the barbiturate binding site.
pyrazolopyrimidineAny of a class of sedative and anxiolytic drugs with similar effects to benzodiazepines, their molecules typified by the linked six-sided pyrimidine ring and five-sided pyrazole ring.
pyrenaA nutlet resembling a seed, or the stone of a drupe, comprising the endocarp and the kernel.
pyreneA polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar
PyreneanOf or pertaining to the Pyrenees, a mountain range separating France and Spain.
PyreneesThe mountain range separating Spain from France, inhabited by Basques in the west, Occitans in the centre-north, Aragonese in the centre-south, and Catalans in the east.
pyrenoidany of several transparent structures found in the chloroplast of certain algae etc.; they are responsible for the fixation of carbon dioxide and the formation of starch
pyrexA kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.
pyrgeometerA device that measures near-surface infrared radiation spectrum, based on the resistance/voltage changes in a material that is sensitive to the net energy transfer by radiation that occurs between itself and its surroundings.
pyridazineA diazine in which the two nitrogen atoms are in the ortho- positions; many of its derivatives are pharmaceuticals, herbicides etc
pyridazinoneThe heterocycle 3-hydroxypyridazine or its keto form
pyridicof or relating to pyridine or its derivatives; pyridyl
pyridinamineAny of three isomeric amino derivatives of pyridine; many of their derivatives are pharmaceuticals
pyridineAny of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and a nitrogen atom; especially the simplest one, C₅H₅N.
pyridoimidazoleA bicyclic heterocycle composed of a pyridine ring fused to one of imidazole
pyridoindoleAny of a class of heterocycles composed of a pyridine ring fused to an indole
pyridomycinAn antibiotic that acts against mycobacteria
pyridoneEither of two isomeric derivatives of pyridine having a carbonyl group either ortho- or para- to the nitrogen atom; in its tautomeric form, it is the pyridine analogue of phenol.
pyridopyrimidineAny of a class of bicyclic heterocycles consisting of a pyridine fused to one of pyrimidine
pyridosineThe amino acid (2S)-2-amino-6-(5-hydroxy-2-methyl-4-oxopyridin-1-yl)hexanoic acid found in heated milk
pyridostatinThe compound 4-(2-aminoethoxy)-N2,N6-bis(4-(2-aminoethoxy)quinolin-2-yl)pyridine-2,6-dicarboxamide that stabilizes the quadruplex form of DNA
pyridostigmineA parasympathomimetic and reversible cholinesterase inhibitor, used to treat muscle weakness and to combat the effects of curariform drug toxicity.
pyridoxalOne of the three natural forms of vitamin B6
pyridoxicRelating to pyridoxic acid or its derivatives
pyridoxineA derivative of pyridine, 4,5-bis(hydroxymethyl)-2-methylpyridin-3-ol, found in fish, liver, cereals and yeast, and essential for the metabolism of amino acids and starch.