tet·rad (t t r d )n. 1. A group or set of four. 2. A tetravalent atom, radical, or element. 3. Biology a. A four-part structure that forms during the prophase of meiosis and consists of two homologous chromosomes, each composed of two sister chromatids. b. Botany A group of four cells, as of spores or pollen grains, formed by division of one mother cell. [Greek tetras, tetrad-; see kwetwer- in Indo-European roots.] te·trad ic adj. |
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|