Английский разговорный словарь (основной) - rickets
Rickets
rickets
ˈrɪkɪts n. (treated as sing. or pl.) a disease of childrenwith softening of the bones (esp. the spine) and bow-legs, caused by a deficiency of vitamin D. [17th c.: orig. uncert., but assoc. by medical writers with Gk rhakhitis RACHITIS]