gigantism

gi·gan·tism

noun \jī-ˈgan-ˌtiz-əm, jə-; ˈjī-gən-\

Definition of GIGANTISM

: development to abnormally large size from excessive growth of the long bones accompanied by muscular weakness and sexual impotence and usually caused by hyperpituitarism before normal ossification is complete—called also macrosomia; compare acromegaly