heterodymus

het·er·od·y·mus

(het'ĕr-od'i-mŭs),
Unequal conjoined twins in which the incomplete parasite, consisting of head and neck and, to some extent, thorax, is attached to the anterior surface of the autosite. See: conjoined twins.
[hetero- + G. didymos, twin]

heterodymus

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