morulationn.
/ˌmɔːr(j)ᵿˈleɪʃn/, /ˌmɒr(j)ᵿˈleɪʃn/, U.S. /ˌmɔrəˈleɪʃ(ə)n/ Embryology. rare.
The development of an ovum into a morula.
ΚΠ
1890 Cent. Dict. Morulation, the conversion of the vitellus or yolk of an ovum into a mulberry-mass (morula) of cleavage-cells.
1967 Proc. National Acad. Sci. U.S.A. 57 1395 It is possible to cultivate large numbers of [sea urchin] embryos which synchronously go through the main stages of early development within three days: morulation, blastulation, gastrulation, and formation of the larva.
1994 Amer. Jrnl. Physiol. 266 c161/2 Significantly, the level of polyadenylated β1-mRNA increases during morulation, while the level of polyadenylated α1-mRNA rather decreases during this period.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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n.1890