noun Pathology.
a rare congenital abnormality characterized by premature and rapid aging, the affected individual appearing in childhood as an aged person and having a shortened life span.

1900–05; < Neo-Latin < Greek progḗr(ōs) prematurely old (pro- pro-2 + gêr(as) old age + -ōs adj. suffix) + Neo-Latin -ia -ia Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
progeria (prəʊˈdʒɪərɪə)
med premature old age, a rare condition occurring in children and characterized by small stature, absent or greying hair, wrinkled skin, and other signs of old age
[C20: from pro-² + Greek gēras old age]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

progeria pro·ge·ri·a (prō-jēr'ē-ə)
A rare congenital childhood disorder marked by gross retardation of growth after the first year and by rapid onset of the physical changes typical of old age, usually resulting in death before age 20. Also called Hutchinson-Gilford syndrome, premature-senility syndrome.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Kimberly has a rare genetic disease, progeria, which ages the body at four and a half times the normal rate.
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