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Definition of Tetrad
1. Noun. The cardinal number that is the sum of three and one.
Generic synonyms: Digit, Figure
Definition of Tetrad
1. n. The number four; a collection of four things; a quaternion.
Definition of Tetrad
1. Noun. A group of four things. ¹
2. Noun. (chemistry) A tetravalent atom or radical. ¹
3. 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. ¹
4. Noun. (biology) Group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis. ¹
¹ Source: wiktionary.com
Definition of Tetrad
1. a group of four [n -S] : TETRADIC [adj]
Medical Definition of Tetrad
1. A group of four, four pollen grains remaining fused together at maturity. (09 Oct 1997)
Lexicographical Neighbors of Tetrad
Literary usage of Tetrad
Below you will find example usage of this term as found in modern and/or classical literature:
1. Studies On The Neoplatonist Hierocles by Ilsetraut Hadot (2004)
"specifies what distinguishes the perfection of the decad from that of the tetrad:
the tetrad possesses a perfection ontologically superior to that of the ..."
2. The Cell in Development and Inheritance by Edmund Beecher Wilson (1900)
"The four chromosomes group themselves in a single tetrad, two passing into the
first polar ... This obviously differs only in degree from tetrad-formation, ..."
3. The Cell in Development and Inheritance by Edmund Beecher Wilson (1911)
"The four chromosomes group themselves in a single tetrad, two passing into the
... This obviously differs only in degree from tetrad-formation, ..."
4. The Cell in Development and Inheritance by Edmund Beecher Wilson (1900)
"The four chromosomes group themselves in a single tetrad, ... This obviously
differs only in degree from tetrad-formation, the latter occurring only when ..."
5. The Cell in Development and Inheritance by Edmund Beecher Wilson (1897)
"Division of the chromosomes (? tetrad- formation) in the first division of the
pollen-mother- cell of the lily. (ab after FARMER and MOORE; ..."
6. Transcendental Magic: Its Doctrine and Ritual by Eliphas Lévi, Arthur Edward Waite (1896)
"In the same way, the philosophical triad, emanating from the antagonism of the
duad, is completed by the tetrad, the four-square ground of all truth. ..."
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