parasyndesisn.

Brit.

/ˌparəsɪnˈdiːsɪs/,

/ˌparəˈsɪndᵻsɪs/, U.S.

/ˌpɛrəˈsɪndəsəs/,

/ˌpɛrəˌsɪnˈdisᵻs/

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: para- prefix¹, syndesis n.

Etymology: < para- prefix¹ + syndesis n., after German Parasyndese (V. Häcker 1907, in Ergebnisse u. Fortschritte der Zool. I. 74). Compare metasyndesis n., and slightly earlier parasynapsis n.

Cell Biology. Now rare or disused.

Side-by-side pairing of chromosomes at meiosis; = parasynapsis n. Cf. metasyndesis n.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > [noun] > other processes in mitosis or meiosis

zonation1899

diakinesis1902

parasynapsis1909

syndesis1909

parasyndesis1911

non-disjunction1913

non-conjunction1925

asynapsis1930

stathmokinesis1938

misdivision1939

metakinesis1948

tandem duplication1959

1911 Jrnl. Morphol. 22 754 The main difference between the views of parasyndesis and metasyndesis lies in the interpretation of the longitudinal cleft of the gemini.

1912 Jrnl. Exper. Zool. 13 392 Do they [sc. the chromatin-elements] conjugate side by side (parasynapsis, parasyndesis), end to end (telosynapsis, metasyndesis) or in both ways?

1925 E. B. Wilson Cell (ed. 3) vi. 508 Evidence has steadily accumulated to show that in a large class of cases synapsis involves a side-by-side union of the synaptic mates (parasynapsis or parasyndesis) instead of an end-to-end union..as was formerly supposed.

Derivatives

parasynˈdetically adv. rare

ΘΚΠ

the world > life > biology > biological processes > genetic activity > [adverb] > other processes

parasynaptically1910

parasyndetically1911

tandemly1968

1911 Jrnl. Morphol. 22 750 The chromosomes conjugate parasyndetically.

1929 Jrnl. Genetics 19 171 She found a continuous spireme composed of parasyndetically paired threads alternating with single ones.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	parasyndesis
释义	parasyndesisn. Brit. /ˌparəsɪnˈdiːsɪs/, /ˌparəˈsɪndᵻsɪs/, U.S. /ˌpɛrəˈsɪndəsəs/, /ˌpɛrəˌsɪnˈdisᵻs/ Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: para- prefix¹, syndesis n. Etymology: < para- prefix¹ + syndesis n., after German Parasyndese (V. Häcker 1907, in Ergebnisse u. Fortschritte der Zool. I. 74). Compare metasyndesis n., and slightly earlier parasynapsis n. Cell Biology. Now rare or disused. Side-by-side pairing of chromosomes at meiosis; = parasynapsis n. Cf. metasyndesis n. ΘΚΠ the world > life > biology > biological processes > genetic activity > [noun] > other processes in mitosis or meiosis zonation1899 diakinesis1902 parasynapsis1909 syndesis1909 parasyndesis1911 non-disjunction1913 non-conjunction1925 asynapsis1930 stathmokinesis1938 misdivision1939 metakinesis1948 tandem duplication1959 1911 Jrnl. Morphol. 22 754 The main difference between the views of parasyndesis and metasyndesis lies in the interpretation of the longitudinal cleft of the gemini. 1912 Jrnl. Exper. Zool. 13 392 Do they [sc. the chromatin-elements] conjugate side by side (parasynapsis, parasyndesis), end to end (telosynapsis, metasyndesis) or in both ways? 1925 E. B. Wilson Cell (ed. 3) vi. 508 Evidence has steadily accumulated to show that in a large class of cases synapsis involves a side-by-side union of the synaptic mates (parasynapsis or parasyndesis) instead of an end-to-end union..as was formerly supposed. Derivatives parasynˈdetically adv. rare ΘΚΠ the world > life > biology > biological processes > genetic activity > [adverb] > other processes parasynaptically1910 parasyndetically1911 tandemly1968 1911 Jrnl. Morphol. 22 750 The chromosomes conjugate parasyndetically. 1929 Jrnl. Genetics 19 171 She found a continuous spireme composed of parasyndetically paired threads alternating with single ones. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1911
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