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| the bone of the lower jaw. |
| the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel. |
ballistocardiogram bal·lis·to·car·di·o·gram (bə-lĭs'tō-kär'dē-ə-grām')
n.
Abbr. BCG
A recording of the body's recoil as measured by a ballistocardiograph.