单词 | vitellophag |
释义 | > as lemmasvitellophag vitellophag n. Brit. /vᵻˈtɛlə(ʊ)faɡ/ , /vʌɪˈtɛlə(ʊ)faɡ/ , U.S. /vaɪˈtɛləˌfæɡ/ , /vəˈtɛləˌfæɡ/ (also vitellophage/vɪˈtɛləʊfeɪdʒ/) [Greek -ϕαγος eating] Entomology a nucleus or energid which, during cleavage and the formation of blastoderm, remains in or moves into the vitellus and assimilates it.ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > yolk > vitellophag vitellophag1892 1892 J. P. McMurrich in Zool. Anzeiger XV. 274 In the same manner the endoderm cells are excluded from the surface of the egg, but in this case there is an actual immigration, the cells sinking down into the interior of the yolk, and becoming ‘vitellophags’. 1904 Science 8 Apr. 588/2 There is no satisfactory evidence to show that the cells..are really such, and not dividing cleavage cells or possibly vitellophags. 1935 Jrnl. Morphol. 58 432 Each presumptive mid-gut epithelial nucleus appropriates a portion of the vitellophage cytoplasm and thus are formed the definitive mid-gut epithelial cells. 1978 R. J. Elzinga Fund. Entomol. iv. 86 Some of these nuclei remain behind to become vitellophags, cells for metabolizing yolk for embryonic use. < as lemmas |
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