noun Pathology.
any skin condition characterized by red vesicular areas.

< Neo-Latin < Greek hídrōia (plural) heat spots (literally, sweat eggs), equivalent to hidr(ṓs) sweat + -ōia, plural of ōión egg; -y- of Neo-Latin < hydr- hydr-1

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hydroa hy·dro·a (hī-drō'ə)
A vesicular eruption, especially of the skin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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