|a family of US medical practitioners. They pioneered group practice and established (1903) the Mayo Clinic in Rochester, Minnesota. Foremost among them were William Worrall Mayo (1819--1911), his sons William James Mayo (1861--1939) and Charles Horace Mayo (1865-- 1939), and Charles's son, Charles William Mayo (1898--1968)|
Mayo Ma·yo (mā'ō), William James. 1861-1939.
American surgeon who with his brother Charles Horace Mayo (1865-1939) founded the Mayo Clinic, a renowned medical center in Rochester, Minnesota.