ariboflavinosis

[ā-rī′bō-flā′və-nōsĭs]
n.
  1. A condition caused by a riboflavin deficiency, characterized by chilosis or angular stomatitis and a magenta-colored tongue.hyporiboflavinosis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.