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释义
the world > life > biology > biological processes > procreation or reproduction > conception > [noun] > synapsis or yolk-division (4)
yolk division1852

= yolk cleavage n.

yolk cleavage1853

division of the ooplasm or yolk (sense 1c), esp. as the initial process in the development of the embryo.

yolk segmentation1857

= yolk cleavage n.

synapsis1895

Biology. Originally in sense of quots. 1895 1905; in modern use, chromosomal pairing during the zygotene stage of meiosis.

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