monilethrix
noun
mo·nil·e·thrix
| \ mə-ˈnil-ə-ˌthriks
\
\
plural moniletriches\ ˌmän-ə-ˈle-trə-ˌkēz
\
\
Medical Definition of monilethrix
: an inherited disease of the hair in which each strand of hair has a beaded appearance due to periodic narrowing of the hair shaft and that is marked chiefly by fragile, brittle hair and patchy alopecia
Note: Monilethrix is typically inherited as an autosomal dominant trait requiring only one parent pass on a copy of the defective gene on a chromosome other than a sex chromosome.