Dr. Wilmore B. Leonard, 61, a professor at the Howard University School of Denistry for 25 years until his retirement last May, died of cancer Sunday at Howard University Hospital.

Dr. Leonard joined the faculty at Howard after earning his degree in dentistry at the school in 1952. In the course of his career he had served as associate director of clinics and secretary to the faculty in addition to teaching oral diagnosis, endodontics and oral therapeutics. He had taught a course in pharmacology since his formal retirement last year.

On the occasion of his retirement he received the Howard University College of Dentistry Alumni Award for outstandings contributions to dental education.

Dr. Leonard was a member of the American Dental Association, the National Dental Association, the Robert T. Freeman Dental Society and the District of Columbia Dental Society. He was the author of numerous articles on periodontology and endodontics published in professional journals.

He was born in Salisbury, Md. He graduated from Hampton Institute in 1939 and then taught at Accomac County High School in Accomac, Va., until he joined the Army Air Force in World War II. He was a pilot and rose to the rank of captain. He saw service in Europe.

He began his dental studies at Howard in 1948. He lived in Washington.

Survivors include his wife, Elizabeth A., of the home; a daughter, Charmaine L. Jackson, of Silver Spring; a brother, Howard E. Jr., of New York City; a sister, Lillian Flamer, of Salisbury, and one grandchild.

The family suggests that expressions of sympathy be in the form of contributions to the Howard University Cancer Research Center, Washington, D.C.