Pronunciation: blŭd rel′ă-tiv
Definition: A popular term describing a relative of a person sharing a common ancestor. No special importance attaches to the blood as a vehicle of inheritance. Spouses are not ordinarily blood relatives and when they are, the marriage is consanguineous and carries a higher risk than average of progeny homozygous by descent from ancestors in common. Such marriages are discouraged and within certain degrees of kindred may be illegal.
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Examples: glitazone, GI cocktail, etc.