| Subject | English | Catalan |
| environ. | alicyclic compound Any substance composed of two or more unlike atoms held together by chemical bonds characterized by straight-chained, branched or cyclic properties | compost alicíclic |
| environ. | aliphatic compound Any organic compound of hydrogen and carbon characterized by a straight chain of the carbon atoms | compost alifátic |
| environ. | alkyl compound Compound containing one or more alkyl radicals | compost alquílic |
| environ. | aromatic compound Compounds characterized by the presence of at least one benzene ring | compost aromàtic |
| math. | compound binomial distribution | distribució beta binomial |
| math. | compound distribution | distribució de freqüències composta |
| math. | compound distribution | distribució composta |
| math. | compound frequency distribution | distribució composta |
| math. | compound frequency distribution | distribució de freqüències composta |
| math. | compound hypergeometric distribution | distribució hipergeomèrica composta |
| math. | compound negative multinomial distribution | distribució multinomial negativa composta |
| math. | compound Poisson distribution | distribució de Poisson composta |
| environ. | halogenated compound A substance containing halogen atoms | compost halogenat |
| environ. | heterocyclic compound Compound in which the ring structure is a combination of more than one kind of atom | compost heterocíclic |
| environ. | lead compound Lead compounds are present as gasoline additives, in paint, ceramic products, roofing, caulking, electrical applications, tubes, or containers. Lead exposure may be due to air, water, food, or soil. Lead in the air is primarily due to lead-based fuels and the combustion of solid waste, coal, oils, and emissions from alkyl lead manufacturers, wind blown dust volcanoes, the burning of lead-painted surfaces, and cigarette smoke. Lead in drinking water comes from leaching from lead pipes, connectors, and solder in both the distribution system and household plumbing | compost de plom |
| environ. | nitro compound Any one of a class of usually organic compounds that contain the monovalent group, -NO2 (nitro group or radical) linked to a carbon atom | nitrocompost |
| environ. | organochlorine compound Organic compounds containing a C-Cl bond | compost organoclorat |
| environ. | organohalogen compound Organic compounds containing a C-halogen bond | compost organohalogenat |
| environ. | organometallic compound Molecules containing carbon-metal linkage; a compound containing an alkyl or aryl radical bonded to a metal | compost organometàl·lic |
| environ. | organonitrogen compound Organic compounds having a C-N bond | compost organonitrogenat |
| environ. | organooxygen compound Compounds, both aliphatic and aromatic, which have a C-O bond, including alcohols, aldehydes, etc. | compost organooxigenat |
| environ. | organophosphorous compound Pesticides that contain phosphorous; short-lived, but some can be toxic when first applied | compost organofosforat |
| environ. | organosilicon compound Any natural substance composed of two or more unlike atoms held together by chemical bonds and containing silicon, a non-metallic element often found in rocks or minerals | compost d'organosílicic |
| environ. | organosulphur compound One of a group of substances which contain both carbon and sulfur | compost organosulfurat |
| environ. | organotin compound Chemical compounds used in anti-foulant paints to protect the hulls of boats and ships, buoys and pilings from marine organisms such as barnacles | compost organoestànnic |
| environ. | substitution of halogenated compounds Halogenated compounds, because of their toxical and persistent character, should be substituted by environmental friendly compounds, like water-based fat solvents in metal processing industry or water-based coating agents | substitució de composts halogenats |
| environ. | surface active compound Any soluble substance composed of two or more unlike atoms held together by chemical bonds that reduces interfacial tension between liquids or a liquid and a solid, often used as detergents, wetting agents and emulsifiers | compost tensoactiu |
| environ. | volatile organic compound Organic compound readily passing off by evaporation | compost orgànic volàtil |