half siblings

One shared parent

Half siblings are brothers or sisters who share one biological parent but not both—same mother but different fathers, or same father but different mothers.

The relationship is distinguished from full siblings, who share both parents, and step-siblings, who share no biological parent but are connected through their parents' marriage.

My half sister and I have the same dad.

blended

blended family

Household with steprelations

stepfamilyHousehold joined by remarriage
remarriageWedding after divorce/widowhood
divorceLegal end of matrimony

co-parenting · custody · stepsibling · household · family dynamics · second marriage · stepparent · stepmother · stepfather · joint custody

genetics

DNA

Hereditary code molecule

genesUnits of heredity
chromosomesGene-bearing nuclear structures
heredityGenetic trait transmission

inheritance · biological · ancestry · genotype · phenotype · allele · dominant · recessive · genome · genetic testing

kinship

brother

Male with shared parents

sisterFemale sibling
familyRelated people together
relativeConnected by blood

kin · bloodline · lineage · descent · ancestry · relation · family tree · consanguinity · kinfolk · progeny

Categories

sibling storiesCain and Abel, Jacob and Esau, Hansel and Gretel, Romulus and Remus, Little Women
genealogyfamily trees, family history, descendants, ancestors, ancestry tracing

Opposites

genetic relatedness

half siblingsfull siblings

Relatives sharing both parents

blood siblings · identical twins · siblings · twin siblings · fraternal twins

biological vs non-biological family

half siblingsstepsiblings

Stepparent's other children

stepbrothers · stepsisters · adoptive siblings

Family

half, halves, halved, halving, halfway, halfback, sibling, siblings

Familiarity: Top 50,000
Profile: Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G