half sibling
One parent shared
A half sibling is a brother or sister who shares one biological parent with you but not the other.
If you have the same mother but different fathers, or the same father but different mothers, you are half siblings: My half sister and I didn't meet until we were adults.
The relationship is distinguished from full siblings, who share both parents, and stepsiblings, who share no biological parent.
Relatedness through shared ancestry
- maternalOf or like mothers
- paternalOf or from father
- lineageDescent from progenitors
- genealogyStudy of family descent
descent · relative · kin · kinfolk · ancestry · heritage · progenitor · descendant
Household with steprelations
- stepsiblingNon-biological brother or sister
- stepbrotherSon of a step-parent
- stepsisterSibling through remarriage
- stepparentSpouse's prior child's caregiver
stepmother · stepfather · stepchild · remarriage · divorce · custody · co-parenting · adoptive
Hereditary code molecule
- chromosomesGene-bearing nuclear structures
- heredityGenetic trait transmission
- genesUnits of heredity
- biologicalRelating to living organisms
bloodline · paternity · maternity · genetic testing · ancestry · traits · inherited · genotype
consanguinity
Relatedness through shared ancestry
genealogy · descent · relative · kin · kinfolk · ancestry · heritage · progenitor · descendant · clan
blended family
Household with steprelations
- stepsiblingNon-biological brother or sister
- stepbrotherSon of a step-parent
- stepsisterSibling through remarriage
stepparent · stepmother · stepfather · stepchild · remarriage · divorce · custody · co-parenting · adoptive · inheritance
DNA
Hereditary code molecule
- chromosomesGene-bearing nuclear structures
- heredityGenetic trait transmission
- genesUnits of heredity
biological · bloodline · paternity · maternity · genetic testing · ancestry · traits · inherited · genotype · allele
- siblingsbrother, sister, twins, brothers, sisters
- fertilityfertility, fecundity, infertility, conception, reproduction
- birth orderfirstborn, lastborn, middle child, only child, eldest
half siblingfull sibling
Child sharing both parents
twin · identical twin · fraternal twin · blood sibling · stepsister
half, sibling, halves, halved, halving, halfway, halfhearted, siblings