Tetrad meaning

tĕtrăd
A group of four things.
noun
1
0
A group or set of four.
noun
1
1
A group or set of four.
noun
1
1
A four-part structure that forms during prophase I of meiosis and consists of two homologous chromosomes, each composed of two identical chromatids. During prophase I of meiosis, one chromosome exchanges corresponding segments of genetic material with the other chromosome in the tetrad in the process called crossing over.
1
2
A group or set of four.
noun
0
0
Advertisement
A tetravalent atom, radical, or element.
noun
0
0
A group of four cells, as of spores or pollen grains, formed from a parent cell by meiosis. As part of the process of spermatogenesis, a spermatocyte divides into a tetrad of four spermatids, cells which go on to develop into sperm.
0
0
(chemistry) A tetravalent atom or radical.
noun
0
0
(biology) Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
noun
0
0
(biology) Group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.
noun
0
0
Advertisement
A tetravalent atom, radical, or element.
noun
0
1
An atom, radical, or element that is tetravalent.
noun
0
1
A group of four similar chromatids formed by the longitudinal division of a pair of homologous chromosomes during meiotic prophase.
noun
0
1
A group of four cells formed by division within a spore mother cell during meiosis.
noun
0
2

Origin of tetrad

  • Greek tetras tetrad- kwetwer- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition