| expressivity | The consistency of a genetic disease. For example, Marfan disease shows variable expressivity. Some persons with Marfan's merely have long fingers and toes while others have the full-blown disease with dislocation of the lens and dissecting aneurysm of the aorta. (12 Dec 1998) |
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| expressure | The act of expressing; expression; utterance; representation. "An operation more divine Than breath or pen can give expressure to." (Shak) Source: Websters Dictionary (01 Mar 1998) |