hydrobromofluorocarbons
plural of hydrobromofluorocarbon

hydrocarbonyl
A mixed hydride and carbonyl of a metal

hydrocarbonyls
plural of hydrocarbonyl

hydrocarbostyril
A nitrogenous hydrocarbon, C₉H₉NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril.

hydrocarbyl
Any univalent radical, derived from a hydrocarbon, such as methyl or phenyl.

hydrocarbylene
any divalent radical formed by removing two hydrogen atoms from a hydrocarbon

hydrocarbylenes
plural of hydrocarbylene

hydrocarbylidene
any divalent radical formed by removing two hydrogen atoms from the same carbon atom of a hydrocarbon, and the free valencies of which form a double bond - R₂C=

hydrocarbylidenes
plural of hydrocarbylidene

hydrocarbylidyne
any divalent radical formed by removing three hydrogen atoms from the same carbon atom of a hydrocarbon, and the free valencies of which form a triple bond

hydrocarbylidynes
plural of hydrocarbylidyne

hydrocarbyls
plural of hydrocarbyl

hydrochinone
Alternative form of hydroquinone.

hydrochinonum
hydroquinone

hydrochlorate
hydrochloride

hydrochlorates
plural of hydrochlorate

hydrocinchonine
Synonym of cinchotine.

hydroderivative
A derivative compound obtained by reaction with hydrogen.

hydroderivatives
plural of hydroderivative

hydrofluate
A supposed compound of hydrofluoric acid and a base; a fluoride.

hydrofluates
plural of hydrofluate

hydrofluorocarbon
A haloalkane composed entirely of carbon, hydrogen, and fluorine.

hydrofluorocarbons
plural of hydrofluorocarbon

hydrofluoroolefin
Any of a class of unsaturated organic compounds, which are composed of hydrogen, fluorine, and carbon atoms and are used as refrigerants.

hydrofluoroolefins
plural of hydrofluoroolefin

hydrofluosilicate
A salt of hydrofluosilic acid.

hydrofluosilicates
plural of hydrofluosilicate

hydrofurfural
Synonym of hydroxymethylfurfural.

hydrogen
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.
Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.
Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, ¹H, or 11H), as contrasted with deuterium and tritium”).

hydrogencarbonate
Alternative spelling of hydrogen carbonate.

hydrogencarbonates
plural of hydrogencarbonate

hydrogenide
A hydride.

hydrogenides
plural of hydrogenide

hydrogens
plural of hydrogen

hydrogenselenate
The anion HSeO₄⁻ or any salt containing this anion; the selenium analogue of hydrogensulfate

hydrogenselenates
plural of hydrogenselenate

hydrogensulfate
The anion HSO₄⁻ or any salt containing this anion

hydrogensulfates
plural of hydrogensulfate

hydrogensulfite
Alternative form of hydrogen sulfite.

hydrogensulfites
plural of hydrogensulfite

hydrogensulphite
Alternative form of hydrogen sulphite.

hydroguret
Any hydride.

hydrogurets
plural of hydroguret

hydrohalide
Any compound or complex formed by reaction with a hydrogen halide

hydrohalides
plural of hydrohalide

hydroimidazolone
A partially hydrogenated form of imidazolone; any derivative of this compound

hydroimidazolones
plural of hydroimidazolone

hydrolith
calcium hydride when used as a source of hydrogen

hydromagnesium
The univalent radical HMg-

hydromel
Mead, especially one of low alcohol content.

hydromellone
An acid prepared by dissolving mellonuret of potassium in boiling water, and adding hydrochloric acid, sulphuric acid, or nitric acid.

hydromels
plural of hydromel

hydron
any hydrogen cation, e.g. a proton (¹H⁺)

hydronaphthoquinone
Synonym of naphthoquinol.

hydronaphthoquinones
plural of hydronaphthoquinone

hydronitrogen
Any binary compound of nitrogen and hydrogen

hydronitrogens
plural of hydronitrogen

hydrons
plural of hydron

hydroperoxy
The univalent radical H-O-O- derived from hydrogen peroxide

hydroperoxydase
An explosive hydroxy derivative of benzotriazole

hydropolysulfide
Any compound of general formula RSₙH (where n is greater than 2) having a chain of sulfur atoms.

hydropolysulfides
plural of hydropolysulfide

hydropolysulphide
Alternative form of hydropolysulfide.

hydropolysulphides
plural of hydropolysulphide

hydroprene
The ethyl ester of an isoprene carboxylic acid ethyl (2E,4E)-3,7,11-trimethyl-2,4-dodecadienoate; it has insecticidal properties

hydroquinidine
The alkaloid (9S)-10,11-dihydro-6′-methoxycinchonan-9-ol derived from quinidine

hydroquinone
The diphenol para-dihydroxy benzene, used as a mild reducing agent in photographic developing; isomeric with catechol and resorcinol.

hydroquinones
plural of hydroquinone

hydrosalt
A salt supposed to be formed by a hydracid and a base.
An acid salt.
A hydrous salt; a salt combined with water of hydration or crystallization.

hydrosalts
plural of hydrosalt

hydroselenide
Any compound formally derived from hydrogen selenide by replacing one hydrogen atom with a metal or other radical
The HSe⁻ anion

hydroselenides
plural of hydroselenide

hydrosilane
Any of a class of compounds in which one or more hydrogen atoms of a silane are replaced by alkyl groups

hydrosilanes
plural of hydrosilane

hydrostannane
Any organotin compound containing a residual Sn-H bond

hydrostannanes
plural of hydrostannane

hydrosulfide
Any compound formally derived from hydrogen sulfide by replacing one hydrogen atom with a metal or other radical; a thiol or mercaptan.
The HS⁻ anion.

hydrosulfides
plural of hydrosulfide

hydrosulfite
dithionite

hydrosulfites
plural of hydrosulfite

hydrosulphide
Alternative spelling of hydrosulfide.

hydrosulphides
plural of hydrosulphide

hydrosulphite
Alternative spelling of hydrosulfite.

hydrotellurate
A salt formed by the union of hydrotelluric acid and the base.

hydrotellurates
plural of hydrotellurate

hydrotrioxide
any organic compound, of general formula R-OOO-H, derived from trioxidane.

hydrotrioxides
plural of hydrotrioxide

hydroxamate
A hydroxylamine compound containing a CONOH group, often serving as chelating agents.

hydroxamates
plural of hydroxamate

hydroxanthommatin
A pigment, 11-(3-amino-3-carboxypropanoyl)-5-hydroxy-1-oxo-4,12-dihydropyrido[3,2-a]phenoxazine-3-carboxylic acid, found in the eye of Drosophila melanogaster

hydroxide
A univalent anion (OH⁻) based on the hydroxyl functional group.
Any substance containing such an anion.

hydroxides
plural of hydroxide

hydroxido
A hydroxide group when a substituent for another

hydroximate
A cyclic compound, similar to a lactone, derived from an oxime

hydroximates
plural of hydroximate

hydroxonium
The cation obtained by reacting a proton with water - H₃O⁺; hydronium.

hydroxoniums
plural of hydroxonium

hydroxyacetone
The hydroxyketone CH₃-CO-CH₂-OH

hydroxyadamantane
Synonym of adamantanol.

hydroxyadamantanes
plural of hydroxyadamantane

hydroxyakuammicine
Synonym of vinervine.

hydroxyaldehyde
Any hydroxy derivative of an aldehyde

hydroxyaldehydes
plural of hydroxyaldehyde

hydroxyalkanoate
Any salt or ester of a hydroxyalkanoic acid

hydroxyalkanoates
plural of hydroxyalkanoate

hydroxyaluminate
A salt or anion containing aluminium and hydroxide groups, Al(OH)₄⁻

hydroxyaluminates
plural of hydroxyaluminate

hydroxyamide
The amide of a hydroxy acid

hydroxyamides
plural of hydroxyamide

hydroxyaniline
Synonym of aminophenol.

hydroxyanilines
plural of hydroxyaniline

hydroxyapatite
A basic calcium phosphate mineral that is the principal inorganic constituent of bone and teeth.

hydroxyapatites
plural of hydroxyapatite

hydroxybenzene
phenol

hydroxybenzoate
Any salt or ester of hydroxybenzoic acid

hydroxybenzoates
plural of hydroxybenzoate

hydroxybutanoate
A salt or ester of hydroxybutanoic acid.

hydroxybutanoates
plural of hydroxybutanoate