| catalogs | Ordered compilations of item descriptions and sufficient information to afford access to them. Files of bibliographic records, created according to specific and uniform principles of construction and under the control of an authority file, which describes the materials contained in a collection, library, or group of libraries. Catalogs include also lists of materials prepared for a particular purpose, such as exhibition catalogs, sales catalogs, garden catalogs, medical supply catalogs. (12 Dec 1998) |
|---|---|
| catalyse | <chemistry> To speed up a chemical reaction. (16 Mar 1998) |
| catalysis | <chemistry> The acceleration of a chemical reaction by a catalyst. (16 Mar 1998) |
| catalyst | <chemistry> A substance that accelerates a chemical reaction, but is not consumed or changed in the process. (16 Mar 1998) |
| catalytic | Relating to or effecting catalysis. (05 Mar 2000) |
| catalytic antibody | <chemistry> Antibody raised against a transition state analogue (e.g. A phosphate analogue of a carboxylic acid ester transition state) that can then catalyse the analogous chemical reaction, though not as effectively as a true enzyme. (16 Mar 1998) |
| catalytic centre | See: active centre. (05 Mar 2000) |
| catalytic model | <epidemiology> A (rather misleading name for a) type of compartmental model in which the force of infection is treated as a parameter to be estimated. (05 Dec 1998) |
| catalytic site | <chemistry> The site on an enzyme where the substrate or substrates (the reactants of a chemical or biochemical reaction) attach in order to convert to the product or products of the reaction, at a much higher speed than the substrate would need to convert to the product alone. (16 Mar 1998) |
| catalyze | To act as a catalyst. (05 Mar 2000) |
| catalyzer | <chemistry> A substance that accelerates a chemical reaction, but is not consumed or changed in the process. (16 Mar 1998) |
| catamenia | Synonym: menses. Origin: G. The menses, ntr. Pl. Of katamenios, monthly, fr. Men, month (05 Mar 2000) |
| catamenial | Relating to the menses. Synonym: catamenial, emmenic. Origin: L. Menstrualis (05 Mar 2000) |
| catamenial pneumothorax | <radiology> FEMALE of childbearing age, (** most spont. Ptx's occur in males), onset of menses with or without 3 days, associated with intrathoracic endometriosis (12 Dec 1998) |
| catamenogenic | Causing menstruation. (05 Mar 2000) |