autosite

[ ôtō-sīt′ ]

n.

The usually larger component of abnormal, unequally conjoined twins that is able to live independently and nourish the other parasitic component.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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