sib

Noun
  1. A person's brother or sister (synset 110614572)
    is a type of: relation, relative - a person related by blood or marriage
    subtypes:
    • half blood - one of siblings who have only one parent in common
    • quad, quadruplet - one of four children born at the same time from the same pregnancy
    • quin, quint, quintuplet - one of five children born at the same time from the same pregnancy
    • triplet - one of three offspring born at the same time from the same pregnancy
    • twin - either of two offspring born at the same time from the same pregnancy
    belongs to: family, family unit - primary social group; parents and children
    same as: sibling
  2. One related by blood or origin;
    Especially on sharing an ancestor with another (synset 110255811)
    is a type of: relation, relative - a person related by blood or marriage
    same as: blood relation, blood relative, cognate

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