Second Degree Relative

**Semantic type:** Human

**Definition:** Any relative who is two meioses away from a particular individual in a family; a relative with whom one quarter of an individual's genes is shared (i.e., grandparent, grandchild, uncle, aunt, nephew, niece, half-sibling) (from Genetics Home Reference glossary)

**Synonyms:** - RELATIVE, SECOND DEGREE - SDR - second-degree relative