blood sibling

"Blood sibling" highlights the biological connection between siblings who share the same parents.

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Definition

B2Family Relationships

(general)A brother or sister with whom one shares both biological parents.

Example

They are blood siblings, having the same mother and father.
Despite being blood siblings, they have very different personalities.

Similar

Terms that have similar or relatively close meanings to "blood sibling":

blood sister blood brother foster sibling three-quarter sibling first cousin sibling fucker half brother-in-law maternal cousin three-quarter brother three-quarter sister flesh and blood half sister-in-law paternal cousin biological mother second cousin natural son next of kin