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monembryony

noun
mon·​em·​bry·​o·​ny | \mäˈnembrēənē, ˌmänemˈbrīə-\
variants: or less commonly monoembryony \ˌmänōˈembrēənē, ˌmänōemˈbrīə-​ \

Definition of monembryony 

1 : the condition of having but a single embryo

2 : production of a single embryo from a single egg

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History and Etymology for monembryony

mon- + embryony

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