sexivalentadj.n.

Brit.

/ˌsɛksᵻˈveɪlənt/,

/ˌsɛksᵻˈveɪln̩t/, U.S.

/ˈsɛksəˌveɪlənt/

Origin: Formed within English, by compounding. Etymons: sexi- comb. form, -valent comb. form.

Etymology: < sexi- comb. form + -valent comb. form. Compare slightly earlier sexavalent adj., hexavalent adj., and slightly later sexvalent adj. at sex- comb. form 1a.

A. adj.

1. Chemistry. = hexavalent adj.

ΘΚΠ

the world > matter > chemistry > valency > [adjective] > having a valency of six

sexivalent1867

hexatomic1868

sexvalent1868

1867 J. Attfield Introd. Pharmaceut. Chem. 73 The atom of iron is considered to be sexivalent, on account of the analogy of its compounds with those of chromium, which is undoubtedly sexivalent.

1878 Amer. Jrnl. Math. 1 72 Here αβγ, as before, is the sexivalent molecule and ABC with the additional bonds AβC, BγA, CαB, the saturated one.

1943 Q. Rev. Biol. 18 338/2 It is possible that neither chromium or molybdenum can be admitted to the diagrams, no proof of their sexivalent nature in the biosphere being available.

1990 Biomaterials 11 331/2 Chromium stainless steels are subjected to transpassivation consisting of oxidation of tervalent chromium to sexivalent chromium.

2. Cell Biology. That is (part of) a sexivalent (see branch B.). Cf. quadrivalent adj. 2.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > genetic components > [adjective] > chromosome > chromosomes in respect of meiosis

non-homologous1883

quadrivalent1898

univalent1898

bivalent1899

plurivalent1901

homologous1903

heterotropic1905

monovalent1906

heteromorphic1917

homomorphic1917

trivalent1921

multivalent1929

sexivalent1931

nullisomic1932

quinquevalent1935

1931 Proc. Royal Soc. B. 108 429 The extent of the pairing varies from three quadrivalent groups to the formation of three sexivalent groups and four quadrivalent groups.

1992 Proc. Royal Soc. B. 248 258/1 Where univalents accompany trivalents or quinquivalents, they are assumed to derive from quadrivalent and sexivalent associations, respectively, at pachytene.

B. n.

Cell Biology. A multivalent consisting of six chromosomes.

ΘΚΠ

the world > matter > chemistry > valency > [noun] > multivalency

multivalencya1881

sexivalent1931

1931 Amer. Naturalist 65 526 The 34 chromosomes may be further associated (called multiple association) into seven groups, four quadrivalents and three sexivalents.

1969 Brittonia 21 37 Configurations..included the highest number of chromosomes possible (i.e., septivalents in the trisomic hexaploids and sexivalents in the hexaploids).

1992 Proc. Royal Soc. B. 248 255/1 The presence of sexivalents confirms a degree of homology between the chromosomes of the parental species.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	sexivalent
释义	sexivalentadj.n. Brit. /ˌsɛksᵻˈveɪlənt/, /ˌsɛksᵻˈveɪln̩t/, U.S. /ˈsɛksəˌveɪlənt/ Origin: Formed within English, by compounding. Etymons: sexi- comb. form, -valent comb. form. Etymology: < sexi- comb. form + -valent comb. form. Compare slightly earlier sexavalent adj., hexavalent adj., and slightly later sexvalent adj. at sex- comb. form 1a. A. adj. 1. Chemistry. = hexavalent adj. ΘΚΠ the world > matter > chemistry > valency > [adjective] > having a valency of six sexivalent1867 hexatomic1868 sexvalent1868 1867 J. Attfield Introd. Pharmaceut. Chem. 73 The atom of iron is considered to be sexivalent, on account of the analogy of its compounds with those of chromium, which is undoubtedly sexivalent. 1878 Amer. Jrnl. Math. 1 72 Here αβγ, as before, is the sexivalent molecule and ABC with the additional bonds AβC, BγA, CαB, the saturated one. 1943 Q. Rev. Biol. 18 338/2 It is possible that neither chromium or molybdenum can be admitted to the diagrams, no proof of their sexivalent nature in the biosphere being available. 1990 Biomaterials 11 331/2 Chromium stainless steels are subjected to transpassivation consisting of oxidation of tervalent chromium to sexivalent chromium. 2. Cell Biology. That is (part of) a sexivalent (see branch B.). Cf. quadrivalent adj. 2. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic components > [adjective] > chromosome > chromosomes in respect of meiosis non-homologous1883 quadrivalent1898 univalent1898 bivalent1899 plurivalent1901 homologous1903 heterotropic1905 monovalent1906 heteromorphic1917 homomorphic1917 trivalent1921 multivalent1929 sexivalent1931 nullisomic1932 quinquevalent1935 1931 Proc. Royal Soc. B. 108 429 The extent of the pairing varies from three quadrivalent groups to the formation of three sexivalent groups and four quadrivalent groups. 1992 Proc. Royal Soc. B. 248 258/1 Where univalents accompany trivalents or quinquivalents, they are assumed to derive from quadrivalent and sexivalent associations, respectively, at pachytene. B. n. Cell Biology. A multivalent consisting of six chromosomes. ΘΚΠ the world > matter > chemistry > valency > [noun] > multivalency multivalencya1881 sexivalent1931 1931 Amer. Naturalist 65 526 The 34 chromosomes may be further associated (called multiple association) into seven groups, four quadrivalents and three sexivalents. 1969 Brittonia 21 37 Configurations..included the highest number of chromosomes possible (i.e., septivalents in the trisomic hexaploids and sexivalents in the hexaploids). 1992 Proc. Royal Soc. B. 248 255/1 The presence of sexivalents confirms a degree of homology between the chromosomes of the parental species. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < adj.n.1867
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