| morula | <biology> Stage of development in holoblastic embryos. The morula stage is usually likened to a spherical raspberry, a cluster of blastomeres without a cavity. (18 Nov 1997) |
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| morulation | <biology> The process of cleavage, or segmentation, of the ovum, by which a morula is formed. Source: Websters Dictionary (01 Mar 1998) |