Relating to or having a single chorion; denoting monovular twins. SYN: monochorial.
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mono·cho·ri·on·ic .män-ō-.kōr-ē-'än-ik also mono·cho·ri·al -'kōr-ē-əl adj of twins sharing or developed with a common chorion
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mono·cho·ri·on·ic (mon″o-kor″e-onґik) [mono- + chorionic] having or developing in a common chorionic sac, such as monozygotic twins.Medical dictionary. 2011.