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spireme
† spireme Cytology. Obs. Also spirem. [ad. G. spirem (W. Flemming Zellsubstanz, Kern und Zelltheilung (1882) xx. 195), f. Ionic Gr. σπείρηµ-α coil, convolution.] The tangled strands of chromosomal material seen in the early stages of cell division, formerly believed to be a single continuous strand ...
Oxford English Dictionary
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dispireme
dispireme Cytology. (daɪˈspaɪəriːm) Also -em. [f. di-2 + spireme.] (See quot. 1896.)1890 W. Turner Cell Theory 31 In the..dispirem stage, the chromatin threads thicken and shorten. 1896 E. B. Wilson Cell 336 Dispireme.., that stage of mitosis in which each daughter-nucleus has given rise to a spirem...
Oxford English Dictionary
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Polytene chromosome
In 1890, he observed similar spireme in a ciliated protozoan Loxophyllum meleagris. The existence of such spireme in Drosophila melanogaster was reported by Bulgarian geneticist Dontcho Kostoff in 1930.
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en.wikipedia.org
pachynema
pachynema, n. Cytol. (pækɪˈniːmə) [a. F. pachynema (V. Grégoire 1907, in La Cellule XXIV. 3707: see pachy-, *-nema.] = pachytene n.1909 Archiv für Zellforschung III. 437 The longitudinal pairing of the univalent spireme segments is completed..at about the middle of the synapsis, giving rise to the t...
Oxford English Dictionary
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strepsinema
† strepsinema Cytology. Obs. [f. Gr. στρεψι-, comb. form of στρέϕειν to twist + νῆµα yarn.] A condition of the nucleus during cell division, characterized by pairs of chromosomes twisted around one another or in the form of twisted rings; in most cases applied to diplotene nuclei.1900 H. H. Dixon in...
Oxford English Dictionary
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chromonema
chromonema Biol. (krəʊməˈniːmə) Pl. chromonemata (-ˈniːmətə). [a. G. chromonema (F. Vejdovsky 1912, in Probl. d. Vererbungsträger ii. 130), f. chromo- 2 + Gr. νῆµα thread.] The coiled threadlike core of a chromatid, believed by some to be the carrier of the genes.1925 E. B. Wilson Cell (ed. 3) 1128 ...
Oxford English Dictionary
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synapse
▪ I. synapse, n. Anat. (sɪˈnæps, ˈsaɪ-) [ad. Gr. σύναψις: see synapsis.] The junction, or structure at the junction, between two neurons or nerve-cells.1899 Allbutt's Syst. Med. VI. 512 A feature of the concatenations of neurons more probably explicative of modification and delay of nerve impulses i...
Oxford English Dictionary
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synizesis
‖ synizesis (sɪnɪˈziːsɪs) Pl. -ses (-siːz). [late L., a. Gr. συνίζησις, n. of action f. συνιζάνειν to sink down, collapse, f. σύν syn-1 + ἰζάνειν to seat, sit, settle down, f. ἴζειν to seat, sit.] 1. Gram. and Pros. Fusion of two syllables into one by the coalescence of two adjacent vowels (or of a ...
Oxford English Dictionary
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postsynaptic
postsyˈnaptic, a. 1. Cytology. [post- B. 1 b.] Subsequent to meiotic synapsis.1909 [see presynaptic a. 1]. 1912 Jrnl. Exper. Zool. XIII. 377 (heading) The post-synaptic spireme. Pachytene and diplotene. 1921 Ann. Bot. XXXV. 366 During the period when the mother-cells are in synapsis and the postsyna...
Oxford English Dictionary
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多线染色体
发现历史
多线染色体最早于1881年由法国昆虫学家爱德华-杰拉德·巴比亚尼在摇蚊唾腺细胞中发现,巴比亚尼将此结构命名为永久性染色质纽(permanent spireme),1890年他也在纤毛虫Loxophyllum meleagris中发现类似结构。
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zh.wikipedia.org
diakinesis
diakinesis Cytology. (ˌdaɪəkaɪˈniːsɪs) [mod.L., ad. G. diakinese (V. Häcker 1897, in Biol. Centralbl. XVII. 701), f. dia-1 + Gr. κίνησις motion.] The last stage of meiotic prophase, immediately preceding the disappearance of the nuclear membrane.1902 E. B. Wilson Cell (ed. 2) 440 Diakinesis (διά, th...
Oxford English Dictionary
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skeine
▪ I. skein, n.1 (skeɪn) Forms: α. 5–7 skeyne, 7– skein. β. 5 skayn(e, 6–7 skaine, 6–8 skain; 6 scayne, 7 sc(h)aine, 8 scain. γ. 6 scan (Sc. sc-, skanȝe), skane, 7 scane. δ. 6 sken(e, Sc. skenye, -ȝe, 7 skiene, skeane, 9 skean. [ad. OF. escaigne (1354 in Godefroy; mod.Picard dial. écaigne, écagne), o...
Oxford English Dictionary
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leptotene
leptotene Cytology. (ˈlɛptəʊtiːn) [ad. F. leptotène (H. von Winiwarter 1900, in Arch. de Biol. XVII. 55): see lepto- and -tene.] The first stage of the prophase of the first meiotic division, in which the chromosomes are apparent as fine slender threads. Also attrib. or as adj.[1900 Jrnl. R. Microsc...
Oxford English Dictionary
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para-
▪ I. para-1 (pærə) before a vowel or h usually par-, repr. Gr. παρα-, παρ-, combining form of παρά prep., occurring in words already formed in Greek, their adaptations, and derivatives, and in modern words formed on the model of these, and, in certain uses, as a living element, in the formation of t...
Oxford English Dictionary
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