| 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) |
| catamnesis | The medical history of a patient after an illness; the follow-up history. Origin: cata-+ G mneme, memory (05 Mar 2000) |
| catamnestic | Related to catamnesis. (05 Mar 2000) |
| catapasm | A dusting powder applied to raw surfaces or ulcers. Origin: G. Katapasma, a powder; katapasso, to sprinkle over (05 Mar 2000) |