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Definition of Progeria
1. Noun. A rare abnormality marked by premature aging (grey hair and wrinkled skin and stooped posture) in a child. 
Definition of Progeria
1. premature aging [n -S]
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1. Noun. A rare abnormality marked by premature aging (grey hair and wrinkled skin and stooped posture) in a child. 
1. premature aging [n -S]