Associations to the word «Tetrad»

Wiktionary

TETRAD, noun. A group of four things.
TETRAD, noun. (cartography) A unit of land area of two by two (that is, four) square kilometres.
TETRAD, noun. (chemistry) A tetravalent atom or radical.
TETRAD, noun. (biology) Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
TETRAD, noun. (biology) A group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.

Dictionary definition

TETRAD, noun. The cardinal number that is the sum of three and one.

Wise words

Words - so innocent and powerless as they are, as standing in a dictionary, how potent for good and evil they become in the hands of one who knows how to combine them.
Nathaniel Hawthorne