Mabel Elizabeth Johnson Viehoever, 92, a former educator, lecturer and world traveler, died Sunday at the Southern Maryland Hospital Center in Clinton. She had a circulatory ailment.

A resident of Oxon Hill for many years, she was the widow of Dr. Arno Viehoever, known internationally for his work in microbiology, food chemistry and pharmacognosy. He died in 1969.

After their marriage in 1915, Mrs. Viehoever assisted her husband in much of his scientific writings.They first lived here from about 1915 to 1923 and then returned in 1943 to their home in Oxon Hill, which still was the family home at her death.

Mrs. Viehoever was born in Mount Carmel, Pa. She earned a master's degree in music from Bucknell College in 1910. An accomplished pianist, she taught music in high school and took further study abroad.

She and her husband lived in Swarthmore, Pa., from 1923 to 1939, when they moved to Bangkok, Thailand. There she taught at Chulanlongkorn Univeristy.

The Viehoevers were interned by the Japanese after the attack on Pearl Harbor in 1941. They later returned to this country on the exchange ship, the Gripsholm. In later years, she accompanied Dr. Viehoever on other foreign scientific trips for the U.S. government.

She was an active charter member of the women's Club in Oxon Hill.

She is surivved by three children, Ellyn V. Chesley, of Oxon Hill; Kent of Forest Heights, and Arnold, of Santa Cruz, Calif.; a sister, Martha L. Johnson, of Mount Carmel, seven grandchildren and a great-grandchild.

The family suggests that expressions of sympathy be in the form of memorial contributions to Children's Hospital.