Definition of tetrad in English:


Syllabification: tet·rad
Pronunciation: /ˈteˌtrad


  • A group or set of four.
    More example sentences
    • In both strains, haploid phenotypes from tetrads yielding four viable spores may be used to measure the strength of crossover interference.
    • Two-thirds of the tetrads gave rise to four normally growing spores and one spore that formed a microcolony of 10 cells.
    • Early in meiosis, each pair of homologs comes together to form a tetrad containing two pairs of sister chromatids.


mid 17th century: from Greek tetras, tetrad- 'four, a group of four'.

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