Look up tetrad in Wiktionary, the free dictionary. Tetrad ('group of 4') or tetrade may refer to:

The meaning of TETRAD is a group or arrangement of four. How to use tetrad in a sentence.

Dec 18, 2025 · Each pair of chromosomes—called a tetrad, or a bivalent—consists of four chromatids. At this point, the homologous chromosomes exchange genetic material by the process of crossing …

Jul 2, 2025 · A tetrad, also known as a bivalent, is the structure formed during prophase I of meiosis. It consists of two homologous chromosomes, each composed of two sister chromatids, tightly aligned …

Jul 22, 2025 · A tetrad is a structure that forms during meiosis, a type of cell division involved in sexual reproduction. It consists of four chromatids, duplicated DNA strands.

a group of four; four things regarded together as a single object or thought. Example: Great Tetrad of senior wranglers, 1898. Dictionary of Collective Nouns and Group Terms.

From 1901 to 2000, there were five lunar tetrads. When four consecutive lunar eclipses are all total, the series is called a tetrad. So begins a lunar eclipse tetrad -- a series of 4 consecutive total eclipses …

TETRAD definition: a group of four. See examples of tetrad used in a sentence.

A tetrad is a structure formed during meiosis that consists of four chromatids, which represent a pair of homologous chromosomes that have undergone genetic recombination.

A tetrad is a group of four things. If you've ordered four pizzas for dinner, you can announce that you are serving a tetrad of pizzas.