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Related to omphalopagus: Siamese twins, conjoined twins


n.1.A form of double monster, in which two individuals are united by a common umbilicus.
References in periodicals archive ?
The more common types of conjoined twins include the thoracopagus type where the fusion is anterior, at the chest, and involves the heart (35%); the omphalopagus type where the fusion is at the mid-trunk (30%); the pygopagus type where there is a posterior union involving the rump (19%); the parapagus type, with a lateral fusion of the lower half of the body extending upwards (5%); and combination types.