Pronunciation: jī′gan-tizm, jī-gan′tizm
1. A condition of abnormal size or overgrowth of the entire body or of any of its parts.
The definition information for gigantism is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.