| anti-TNF compound | a class of drugs that block the action of tumor necrosis factor (TNF), used in cases of rheumatoid arthritis because TNF instigates inflammation of the joints |
| compound | an enclosure of residences and other building (especially in the Orient) |
| compound lens | a lens system consisting of two or more lenses on the same axis |
| compound lever | a pair of levers hinged at the fulcrum |
| compound microscope | light microscope that has two converging lens systems: the objective and the eyepiece |
| explosive compound | a compound that is explosive |
hydrogen bomb
H-bomb
fusion bomb
thermonuclear bomb | a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium |
physical pendulum
compound pendulum | pendulum consisting of an actual object allowed to rotate freely around a horizontal axis |
| hydrogen ion concentration | the number of moles of hydrogen ions per cubic decimeter |
| compound eye | in insects and some crustaceans: composed of many light-sensitive elements each forming a portion of an image |
| compound | a whole formed by a union of two or more elements or parts |
| compound morphology | the part of grammar that deals with combinations of simple words into compound words |
| compound sentence | a sentence composed of at least two coordinate independent clauses |
| hydrogen ion | a positively charged atom of hydrogen, that is to say, a normal hydrogen atomic nucleus |
| hydrogen bond | a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond |
| compound pistil | consists of two or more fused carpels |
| compound leaf | a leaf composed of a number of leaflets on a common stalk |
| compound interest | interest calculated on both the principal and the accrued interest |
| compound number | a quantity expressed in two different units, one hour and ten minutes |
complex fraction
compound fraction | a fraction with fractions in the numerator or denominator |
compound fracture
open fracture | bone fracture associated with lacerated soft tissue or an open wound |
| alicyclic compound | an aliphatic compound that contains a ring of atoms |
| aliphatic compound | organic compound that is an alkane or alkene or alkyne or their derivative |
| aromatic compound | a hydrocarbon containing one or more benzene rings that are characteristic of the benzene series of compounds |
hydrazoic acid
azoimide
hydrogen azide
HN | a colorless explosive liquid that is volatile and poisonous and foul-smelling |
| hydrogen cyanide | a highly poisonous gas or volatile liquid that smells like bitter almonds, becomes a gas at arounddegree Fahrenheit and is most dangerous when inhaled, the anhydride of hydrocyanic acid, used in manufacturing |
| anionic compound | a compound characterized by an active anion |
| binary compound | chemical compound composed of only two elements |
chelate
chelate compound | a heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions |
hydrogen
H
atomic number | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas, the simplest and lightest and most abundant element in the universe |
| hydrogen atom | an atom of hydrogen |
acidic hydrogen
acid hydrogen | a hydrogen atom in an acid that forms a positive ion when the acid dissociates |
deuterium
heavy hydrogen | an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen) |
| quaternary ammonium compound | a compound derived from ammonium with hydrogen atoms replaced by organic groups, used as surface-active agents, disinfectants, and in drugs |
| organic compound | any compound of carbon and another element or a radical |
conjugated protein
compound protein | a protein complex combining amino acids with other substances |
bicarbonate
hydrogen carbonate | a salt of carbonic acid (containing the anion HCO) in which one hydrogen atom has been replaced, an acid carbonate |
bicarbonate of soda
sodium hydrogen carbonate
sodium bicarbonate
baking soda
saleratus | a white soluble compound (NaHCO) used in effervescent drinks and in baking powders and as an antacid |
hydrogen peroxide
peroxide | a viscous liquid with strong oxidizing properties, a powerful bleaching agent, also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels |
complex
coordination compound | a compound described in terms of the central atom to which other atoms are bound or coordinated |
compound
chemical compound | (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight |
potassium bicarbonate
potassium acid carbonate
potassium hydrogen carbonate | a crystalline salt (KHCO) that is used in baking powder and as an antacid |
| hydrogen bromide | a colorless gas that yields hydrobromic acid in solution with water |
| hydrogen chloride | a colorless corrosive gas (HCl) |
| hydrogen fluoride | a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride, solutions in water are hydrofluoric acid |
| hydrogen iodide | a colorless gas that yields hydroiodic acid in aqueous solution |
| hydrogen sulfide | a sulfide having the unpleasant smell of rotten eggs |
| inorganic compound | any compound that does not contain carbon |
cream of tartar
tartar
potassium bitartrate
potassium hydrogen tartrate | a salt used especially in baking powder |
heterocyclic compound
heterocyclic
heterocycle | a compound containing a heterocyclic ring |