tetrad

Signification (Anglais)

1. A group of four things.
2. Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
3. A group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.
4. A unit of land area of two by two (that is, four) square kilometres.
5. A tetravalent atom or radical.
6. A group of four basis vectors for a four-dimensional manifold in differential geometry.
7. A chord comprised of four notes; a tetrachord.

Concepts

quaternion

quatre

4

quatuor

10

tétrade

Quaternion

quaternions

Synonymes

quadruplet

quatern

Little Joe

four

quartette

quaternary

quaternion

IV

quaternity

4

foursome

quadrant

quartet

Coupé comme

tet‧rad

Prononcé comme (IPA)

/ˈtɛtɹæd/

Étymologie (Anglais)

From Ancient Greek τετράς (tetrás), analysable as tetra- + -ad.