punarnavine
A quinoline alkaloid present in the plants of the species Boerhavia diffusa.

punarnavoside
A glycoside of punarnavine

pungenin
A phenolic glycoside present in Picea pungens

pungenol
The phenol 3',4'-dihydroxyacetophenone

punicin
Synonym of pelargonin.
Synonym of pelletierine.

pupacide
Any pesticide that attacks the pupal stage of an insect

pupacides
plural of pupacide

purdonian
Alternative form of purdonium (“coal scuttle”).

purdonians
plural of purdonian

purdonium
A coal scuttle.

purdoniums
plural of purdonium

purell
alcohol-based hand sanitizer gel.

purine
Any of a class of organic heterocyclic compounds, composed of fused pyrimidine and imidazole rings, that constitute one of the two groups of organic nitrogenous bases (the other being the pyrimidines) and are components of nucleic acids.

purines
plural of purine

purinyl
A univalent radical derived from a purine

purpnin
A particular steroid glycoside.

purpogallin
Misspelling of purpurogallin.

purpronin
A particular steroid glycoside.

purpureagitoside
A particular steroid glycoside.

purpureaglycoside
A particular steroid glycoside.

purpurogallin
A red crystalline compound, the aglycon of several glycosides from nutgalls and oak barks.

purpuroxanthin
1,3-dihydroxyanthraquinone

purree
A substance used in making the pigment Indian yellow.

purrees
plural of purree

puwainaphycins
plural of puwainaphycin

pycnopodioside
A particular steroid glycoside.

pymetrozine
The triazine pesticide 6-methyl-4-[(E)-pyridin-3-ylmethylideneamino]-2,5-dihydro-1,2,4-triazin-3-one

pyoluteorin
An antimicrobial compound found in Pseudomonas.

pyomelanin
A pigment, related to melanin, that results from the catabolism of tyrosine and phenylalanine

pyorubin
A red pigment produced by Pseudomonas aeruginosa.

pyoxanthin
A yellow pigment isolated from Bacillus pyocyanicus.

pyracarbolid
A particular fungicide.

pyran
Any 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.

pyranoglucoside
The pyranose form of a glucoside

pyranol
Any alcohol derived from a pyran.

pyranols
plural of pyranol

pyranone
Synonym of pyrone.

pyranones
plural of pyranone

pyranoside
Any glycoside of a pyranose

pyranosides
plural of pyranoside

pyranosyl
A univalent radical derived from a pyranose

pyranosyls
plural of pyranosyl

pyrans
plural of pyran

pyrazinoate
Any salt or ester of pyrazinoic acid

pyrazinoates
plural of pyrazinoate

pyrazinone
A heterocyclic amide derived from pyrazine

pyrazinones
plural of pyrazinone

pyrazolide
The anion produced when a hydrogen ion is removed from pyrazole.

pyrazolone
A five-membered unsaturated heterocyclic ketone (or lactam), derived from pyrazole, that is the basis of several pharmaceuticals

pyrazolones
plural of pyrazolone

pyrazophos
A systemic fungicide used against powdery mildew.

pyrazoxyfen
The herbicide 2-[4-(2,4-dichlorobenzoyl)-1,3-dimethylpyrazol-5-yloxy]acetophenone.

pyrenol
Any phenol derived from pyrene

pyrenols
plural of pyrenol

pyrenyl
A univalent radical derived from pyrene

pyrenyls
plural of pyrenyl

pyribenzoxim
The herbicide benzophenone O-[2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoyl]oxime.

pyridazinone
The heterocycle 3-hydroxypyridazine or its keto form

pyridine
Any of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and a nitrogen atom; especially the simplest one, C₅H₅N.

pyridines
plural of pyridine

pyridinio
A univalent radical derived from pyridine

pyridinitril
A particular fungicide.

pyridinol
The equivalent of a phenol derived from pyridine

pyridinols
plural of pyridinol

pyridoxate
Any salt or ester of a pyridoxic acid

pyridoxyl
A univalent radical derived from the hydroxyl form of pyridone

pyridoxyls
plural of pyridoxyl

pyridylamine
pyridyl + amine

pyrifenox
A particular fungicide.

pyrimethanil
A particular pesticide.

pyrimidinedione
Any of a class of chemical compounds characterized by a pyrimidine ring substituted with two carbonyl groups.

pyrimidinediones
plural of pyrimidinedione

pyrimidinyl
A univalent radical derived from pyrimidine

pyrimidole
Any alcohol that has a pyrimidine substituent

pyrimidoles
plural of pyrimidole

pyrimidotriazinedione
A bicyclic heterocyclic ketone

pyrimidotriazinediones
plural of pyrimidotriazinedione

pyrimitate
A pesticide.

pyrinuron
A particular rodenticide.

pyriproxyfen
A pyridine-based pesticide effective against a variety of arthropods.

pyrithione
The tautomeric compound 1-hydroxy-2(1H)-pyridinethione (thione form) or 2-pyridinethiol 1-oxide (thiol form)

pyroacid
any acid obtained by heating another

pyroacids
plural of pyroacid

pyroantimonate
Any salt of pyroantimonic acid

pyroantimonates
plural of pyroantimonate

pyroarsenate
Any salt of pyroarsenic acid.

pyroarsenates
plural of pyroarsenate

pyroborate
Any salt of pyroboric acid.

pyroborates
plural of pyroborate

pyrocarbonate
Any ester of the hypothetical pyrocarbonic acid, having general formula R-O-CO-O-CO-O-R

pyrocarbonates
plural of pyrocarbonate

pyrocatechin
pyrocatechol

pyrocatechins
plural of pyrocatechin

pyrocatechol
A dihydric phenol, benzene-1,2-diol, present in some tars.

pyrocatechols
plural of pyrocatechol

pyrogallate
Any salt of the phenol pyrogallol when viewed as an acid.

pyrogallates
plural of pyrogallate

pyrogallol
A poisonous trihydroxy phenol, 1,2,3-trihydroxybenzene, C₆H₃(OH)₃, used as a photographic developer.

pyrogallols
plural of pyrogallol

pyroglutamine
A cyclic derivative of glutamine related to pyroglutamic acid

pyroglutamyl
The univalent radical derived from pyroglutamic acid

pyroglutamyls
plural of pyroglutamyl

pyroglycerin
nitroglycerin; diglycerol

pyrolidine
Misspelling of pyrrolidine.

pyrolidone
Misspelling of pyrrolidone.

pyrolidonyl
Misspelling of pyrrolidonyl.

pyrollidine
Misspelling of pyrrolidine.

pyromalate
Any salt or ester of pyromalic acid (now known as maleic acid).

pyromalates
plural of pyromalate

pyromucate
Any salt or ester of pyromucic acid.

pyromucates
plural of pyromucate

pyromucite
Any salt of pyromucous acid

pyrone
Any of a class of cyclic chemical compounds that contain an unsaturated six-membered ring with two double bonds, one oxygen atom and a ketone functional group.

pyrones
plural of pyrone

pyrophosphatase
An acid anhydride hydrolase that acts upon diphosphate bonds

pyrophosphatases
plural of pyrophosphatase

pyrophosphate
Any salt or ester of pyrophosphoric acid.

pyrophosphates
plural of pyrophosphate

pyrophosphoramide
Any amide of a pyrophosphoric acid

pyrophosphoramides
plural of pyrophosphoramide

pyroquilon
A particular fungicide.

pyrosilicate
The silicate anion Si₂O₇⁶⁻; any compound containing this anion

pyrosilicates
plural of pyrosilicate

pyrosoda
A mixture of pyrogallic acid and soda used as a photographic developer.

pyrosulfate
Any salt of pyrosulfuric acid.

pyrosulfates
plural of pyrosulfate

pyrosulfite
metabisulfite

pyrosulfites
plural of pyrosulfite

pyrosulphate
Alternative spelling of pyrosulfate.

pyrosulphates
plural of pyrosulphate

pyrosulphite
The anion S₂O₅²⁻; any salt containing this anion

pyrosulphites
plural of pyrosulphite

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.

pyrotartrates
plural of pyrotartrate

pyrotartrimide
The imide of pyrotartaric acid

pyrotol
An explosive usually used in combination with dynamite.

pyroxasulfone
The pesticide 3-[[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazol-4-yl]methylsulfonyl]-5,5-dimethyl-4H-1,2-oxazole

pyroxychlor
A particular fungicide.

pyroxyfur
A particular fungicide.

pyroxyle
Archaic form of pyroxylin.

pyroxyles
plural of pyroxyle

pyroxylin
A highly inflammable form of nitrocellulose; used in the manufacture of collodion and lacquers.

pyroxylins
plural of pyroxylin