leukonychia

[lōō′kō-nĭkē-ə]
n.
  1. The occurrence of white spots or patches under the nails due to the presence of air bubbles between the nail and its bed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.