| etioporphyrin | A porphyrin derivative characterised by the presence on each of the four pyrrole rings of one methyl group and one ethyl group; four isomeric forms are thus possible. (05 Mar 2000) |
|---|---|
| etioporphyrins | Porphyrins with four methyl and four ethyl side chains attached to the pyrrole rings. (12 Dec 1998) |
| etiotropic | Directed against the cause; denoting a remedy that attenuates or destroys the causal factor of a disease. Origin: G. Aitia, cause, + trope, a turning (05 Mar 2000) |