| 单词 | zona radiata |
| 释义 | > as lemmaszona radiata zona radiata n. a radially striated form of the zona pellucida surrounding the ova of certain vertebrates as seen in the light microscope. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > zones of zona pellucida1841 zona radiata1881 1881 F. M. Balfour Treat. Compar. Embryol. II. iv. 55 The ovum [of Teleosei] when laid is usually invested in the zona radiata only. 1925 E. B. Wilson Cell (ed. 3) iv. 272 The zona radiata of the vertebrate ovum, conspicuously shown in the fishes, is a thick and often double membrane traversed by fine radial canals. 1964 T. J. Parker & W. A. Haswell Text-bk. Zool. (ed. 7) II. 319 The ovum [of Salmo trutta, the brown trout] is covered by a thick membrane, the zona radiata. < as lemmas |
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