- engastrius
- Unequal conjoined twins in which the smaller parasite is wholly or partly within the abdomen of the larger autosite. [G. en, in, + gaster, belly]
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en·gas·tri·us (en-gasґtre-əs) [en- + Gr. gastēr belly] asymmetrical conjoined twins with the parasitic twin contained within the abdomen of the larger twin.
Medical dictionary. 2011.