From information database, the free resource
Jump to navigation Jump to search
For other uses, see Sister (disambiguation) and Sisters (disambiguation).
Biological sisters who share many phenotypic facial features

A sister is a woman or girl who shares one or more parents with another individual.[1] The male counterpart is a brother. Although the term typically refers to a familial relationship, it is sometimes used endearingly to refer to non-familial relationships.[2] A full sister is a first degree relative.