| DOM | deaminated O-methyl metabolite; department of medicine; dimethoxymethylamphetamine; dissolved organi... |
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| LOC | laxative of choice; level of consciousness; liquid organic compound; locus of control; loss of consc... |
| OABP | organic anion binding protein |
| OAD | obstructive airway disease; organic anionic dye |
| OALF | organic acid labile fluid |
| discharge of fill material | The addition of fill material into waters of the U.S. The term generally includes, without limitation, the following activities: placement of fill that is necessary for the construction of any structure in a water of the U.S., the building of any structure or impoundment requiring rock, sand, dirt, or other material for its construction, site-development fills for recreational, industrial, commercial, residential, and other uses, causeways or road fills, dams and dikes, artificial islands, property protection and/or reclamation devices such as riprap, groins, seawalls, breakwaters, and revetments, beach nourishment, levees, fill for structures such as sewage treatment facilities, intake and outfall pipes associated with power plants and subaqueous utility lines, and artificial reefs. The term does not include plowing, cultivating, seeding, and harvesting for the production of food, fibre, and forest products. (09 Oct 1997) |
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| impression material | Any substance or combination of substances used for making a negative reproduction or impression. (05 Mar 2000) |
| iodinated contrast material | A substance that contains iodine that can be injected, swallowed or given as an enema for the purpose of diagnostics. Iodinated contrast is radiopaque. This means that conventional X-rays will highlight the course of the contrast in the body. (27 Sep 1997) |
| type material | <zoology> A collective term for all type specimens. Zoologists should ensure that such material is transferred as quickly as possible to public institutions where their safety is guaranteed and they are accessible to other workers. (09 Jan 1998) |
| unconsolidated parent material | <ecology> Material from which a soil develops. (09 Oct 1997) |
| fertile material | <physics> In nuclear physics, this refers to a nuclide which converts to fissile material upon neutron capture and subsequent radioactive decay. Examples include Uranium-238 and Thorium-232. (09 Oct 1997) |
| fill material | Any material used for the primary purpose of replacing an aquatic area with dry land or of changing the bottom elevation of a waterbody. The term does not include any pollutant discharged into the water primarily to dispose of waste. (09 Oct 1997) |
| fissile material | <radiobiology> Material containing a large number of easily fissionable nuclei which give off multiple neutrons in the fission process. Usual meaning is that if a sufficiently large amount of fissile material is put together, a fission chain reaction can occur. Sometimes used synonymously with fissionable material, i.e., material that can be fissioned (though often under restricted circumstances, such as only with thermal (slow) neutrons). A more restricted meaning use of fissile material limits the concept to those materials which can be fissioned by neutrons of all energies (fast & slow). Examples include Uranium-235 and Plutonium-239. (09 Oct 1997) |
| acute organic brain syndrome | <syndrome> A constellation of behavioural or psychological signs and symptoms including problems with attention, concentration, memory, confusion, anxiety, and depression caused by transient or permanent dysfunction of the brain. Synonym: acute organic brain syndrome, OBS, organic mental syndrome. (05 Mar 2000) |
| volatile organic compounds | (VOC) Emissions of non-methane hydrocarbons, measured by standard DEQ methods. (05 Dec 1998) |
| substance-induced organic mental disorders | Mental disorders caused by use of drugs, e.g., cocaine. (05 Mar 2000) |
| organic | Any foods grown without the use of chemical fertilisers or pesticides, in soil made rich by composting and mulching. Pertaining to carbon-based compounds produced by living plants, animals or by synthetic processes. (27 Sep 1997) |
| organic acid | An acid made up of molecules containing organic radicals; e.g., acetic acid, citric acid, which contain the ionizable -COOH group. (05 Mar 2000) |
| organic brain syndrome | <syndrome> A constellation of behavioural or psychological signs and symptoms including problems with attention, concentration, memory, confusion, anxiety, and depression caused by transient or permanent dysfunction of the brain. Synonym: acute organic brain syndrome, OBS, organic mental syndrome. (05 Mar 2000) |
| organic catalyst | A catalyst that is an organic molecule. See: enzyme, ribozyme. (05 Mar 2000) |