| 单词 |
morula |
| 释义 |
▪ I. ‖ morula|ˈmɔər(j)ələ|
[mod.L., dim. of L. mōrum mulberry: see moro1.]
1. Path. In various uses (see quots.).
1856Mayne Expos. Lex., Morula, term for a mulberry-formed, fungous excrescence: a morule. 1891Syd. Soc. Lex., Morula... Also, a synonym of Frambœsia. 1897Allbutt's Syst. Med. II. 506 Frambœsia is..essentially a disease of the tropics, though possibly the ‘morula’, or button-scurvy of Ireland..was closely allied to..it.
2. Embryol. Haeckel's term for that stage of development of an ovum in which it has become completely segmented; an ovum at this stage of development.
1874E. R. Lankester in Phil. Trans. CLXV. 33 The name Gastrula is given by Professor Haeckel to the embryonic form which I had proposed to designate by the old name Planula; and the multicellular blastosphere, from which the Gastrula is developed, which I had proposed to speak of as a polyplast, he well christens the Morula. 1875Huxley in Encycl. Brit. II. 51/1 All the Metazoa, in fact, commence their existence in the form of an ovum... The ovum, after impregnation, divides into cleavage masses, or blastomeres, giving rise to a Morula.
Hence ˈmorular a., ‘relating to a morula’ (Syd. Soc. Lex. 1891); moruˈlation, the conversion of the vitellus or yolk of an ovum into a morula (Cent. Dict. 1890); ˈmoruloid a., having the character of, or resembling a morula (Ibid.).
▪ II. morula
var. marula. |
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