|1.||a group or series of four|
|2.||the number four|
|3.||botany a group of four cells formed by meiosis from one diploid cell|
|4.||genetics a four-stranded structure, formed during the pachytene stage of meiosis, consisting of paired homologous chromosomes that have each divided into two chromatids|
|5.||chem an element, atom, group, or ion with a valency of four|
|6.||ecology a square of 2 × 2 km used in distribution mapping|
|[C17: from Greek tetras, from tettares four]|
tetrad tet·rad (tět'rād')
A group or set of four.
A tetravalent atom, radical, or element.
A group of four chromatids formed from each of a pair of homologous chromosomes that split longitudinally during the prophase of meiosis.
|tetrad (tět'rād') Pronunciation Key