- Types:
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half blood
one of siblings who have only one parent in common
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quad, quadruplet
one of four children born at the same time from the same pregnancy
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quin, quint, quintuplet
one of five children born at the same time from the same pregnancy
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triplet
one of three offspring born at the same time from the same pregnancy
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twin
either of two offspring born at the same time from the same pregnancy
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dizygotic twin, fraternal twin
either of two twins who developed from two separate fertilized eggs
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identical twin, monozygotic twin, monozygous twin
either of two twins developed from the same fertilized ovum (having the same genetic material)