| heme | 1. <biochemistry> Compounds of iron complexed in a porphyrin (tetrapyrrole) ring that differ in side chain composition. Haems are the prosthetic groups of cytochromes and are found in most oxygen carrier proteins. 2. <prefix> haem-, eaning relating to blood. Origin: G. Haima (21 Jun 2000) |
|---|---|
| oxidized rhizosphere | Oxidized channels and soil surrounding living roots and rhizomes in plants. (09 Oct 1997) |