chlorine /klōˈ, klöˈrēn/ noun

A yellowish-green halogen gaseous element (symbol Cl; atomic no 17) with a peculiar and suffocating odour, used in bleaching, disinfecting, and poison gas warfare (chlorine water an aqueous solution of chlorine)

chlorinˈity noun

(esp in seawater) a measure of the amounts of chlorine, iodine, bromine and fluorine present

chloˈrinize or chloˈrinise transitive verb

To chlorinate

chloˈrite noun

1. A salt of chlorous acid combined with a metal or other chemical (chem)
2. A general name for a group of minerals, hydrated silicates of magnesia, iron and alumina, typically dark green and rather soft, resembling mica but not elastic (chlorite-schistˈ a schistose rock composed of chlorite, usu with quartz, epidote, etc)

chloritˈic adjective

Relating to, of the nature of, or containing, the mineral chlorite (chloritic marl a marl at the base of the English Chalk stained green with glauconite (not chlorite))

chloritīzāˈtion or chloritīsāˈtion noun (geology)

The alteration of ferromagnesian minerals into chlorite or similar material

chlorobrōˈmide noun

1. A compound of chlorine and bromine with a metal or organic radical
2. A photograph taken on paper coated with this

chlorocruˈorin noun

A green respiratory pigment found in some Polychaeta

chloˈrodyne noun

A patent medicine of anodyne and hypnotic effect, containing chloroform

chlorofluorocarˈbon noun

An alkane in which chlorine and fluorine atoms have been substituted for hydrogen atoms, used in aerosols, refrigerants, etc, some of which are thought to break down ozone in the earth's atmosphere (abbrev CFC)

chloroform /klorˈō-förm/ noun

A limpid, mobile, colourless, volatile liquid (CHCl₃) with a characteristic odour and a strong sweetish taste, used as an anaesthetic, and as a solvent for oils, resins and various other substances (also trichloromēˈthane)

To administer chloroform to, in order to render unconscious

chlorˈoformer or chlorˈoformist noun

chloromˈeter noun

An apparatus for measuring available chlorine in bleaching powder, etc

chlorometˈric adjective

chloromˈetry noun

Chloromyˈcetin® (or /-mī-sētˈin/) noun

A brand name for the drug chloramphenicol

Chlorophyceae /-fisˈi-ē/ plural noun

(Gr phȳkos seaweed) a class of green algae living predominantly in fresh water

chlorophyll or chlorophyl /klorˈə-fil or klöˈrō-fil/ noun

(Gr phyllon leaf) the green pigment present in all plants and algae, involved in the process of photosynthesis

chlorophyllous /klör-ofˈi-ləs/ adjective

Chlorophyta /-fīˈtə/ plural noun

(Gr phyton plant) the green algae, from which all higher plants evolved

chloˈroplast noun

(Gr plastos moulded) a chlorophyll-bearing plastid in plants and algae

chloroplastˈal adjective

chlorˈoprene noun

A colourless liquid derived from acetylene and hydrochloric acid and used in the production of neoprene

chloˈroquin or chlorˈoquine noun

A drug used to suppress malaria and as an anti-rheumatic

chlorōˈsis noun

1. Formerly, a wasting disease (green sickness) typically affecting young women, characterized by anaemia, extreme lassitude and a greenish tinge of the skin, caused by deficiency of iron
2. Blanching of the green parts of a plant in which production of chlorophyll has been affected by mineral deficiency, lack of light, etc (botany)

chlorothīˈazide noun

A synthetic drug (C₇H₆ClN₃O₄S₂), used in treating hypertension, heart failure, etc

chlorotˈic adjective

Relating to or affected by chlorosis

chloˈrous adjective

Of, containing or derived from chlorine in its trivalent form (chlorous acid a hypothetical acid (HClO₂), known in solution and by its salts)

chlorprōˈmazine noun

An antipsychotic drug used in the treatment of schizophrenia and mania

chlorpyr'ifos noun

A powerful organophosphate insecticide

chlortetracycˈline noun

A yellow antibiotic used to treat some bacterial infections