To be consanguineous is to be related by blood. A mother and her biological child are consanguineous.
Consanguineous comes from a Latin word meaning "of the same blood," and that's exactly what this word means. This word applies to everyone who is a blood relation: a mother and father are not consanguineous, but they are both consanguineous with their biological children. All the puppies or kittens in a litter are consanguineous. First cousins are consanguineous. An adopted child will not be consanguineous with anyone in his or her adoptive family.
Close your vocabulary gaps with personalized learning that focuses on teaching the words you need to know.