Rickets

noun, Pathology.
1.
a disease of childhood, characterized by softening of the bones as a result of inadequate intake of vitamin D and insufficient exposure to sunlight, also associated with impaired calcium and phosphorus metabolism.
noun
1.
(functioning as singular or pl) (pathol) a disease mainly of children, characterized by softening of developing bone, and hence bow legs, malnutrition, and enlargement of the liver and spleen, caused by a deficiency of vitamin D

rickets rick·ets (rĭk’ĭts)
n.
A deficiency disease resulting from a lack of vitamin D or calcium and from insufficient exposure to sunlight, characterized by defective bone growth and occurring chiefly in children. Also called infantile osteomalacia, juvenile osteomalacia, rachitis.
rickets
(rĭk’ĭts)
A bone disease seen mostly in children, caused by a deficiency of vitamin D, usually as a result of inadequate dietary intake or lack of exposure to sunlight. This deficiency causes decreased calcium absorption from the intestine and abnormalities in formation and mineralization of skeletal bone, resulting in defective bone growth and deformity.