Greta H. Segall, 47, a dental hygenist in Washington for 15 years and the wife of Arthur Segall, a former advertising executive of The Washington Daily News and The Washington Star, died of cancer Tuesday in Memphis, Tenn.

Born in Columbus, Ohio, Mrs. Segall graduated in 1950 from Ohio State University with a degree in history and training as a dental hygenist.

She then worked as a dental hygenist for three years in New York City and six years in Columbus, before moving to Annandale in 1960.

While living in the Washington area she served as a dental hygenist for the late Dr. Gerald Audette and for Dr. Kenneth Rankin, both dentists practicing in the District of Columbia. In 1975 she moved to Germantown, Tenn., when her husband became national advertising manager for the Memphis Publishing Co.

Surviving are her husband and three children, James, Sharon and Arthur Jr., all of the Tennessee home; a brother, Dr. Albert Cohen of Miami, Fla.; two sister, Miriam Paine and Ruth Papier, both of Columbus; and her father, Leo Cohen, also of Columbus.

The family suggests that expressions of sympathy be made in the form of contributions to the Medical Oncology Division of the Georgetown University Hospital.