You searched for: “tetrad
tetrad
1. A group of four things with something in common.
2. An element having a valence or combining a power of four.
3. A group, or series, of four similar bodies, things, or people.
4. The cardinal number that is the sum of three and one.
5. A group of four parts, referring to cells produced by division in two planes, or of a chromosome in four parts in preparation for two mitotic divisions in maturation.
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