Sister Marie Antoinette, a retired first-grade teacher, died of a blood clot Thursday at Johns Hopkins Bayview Medical Center. She was 82 and had lived at her order's motherhouse in the Woodbrook section of Baltimore County since 1978.

She taught at St. Margaret Parochial School in Bel Air for 16 years and held other education posts at St. Wenceslaus in East Baltimore, St. Thomas Aquinas in Hampden and St. Michael in Upper Fells Point.

Born Carolina Fiermonte in East Boston, Mass., she entered the School Sisters of Notre Dame in Baltimore in 1942 and professed her vows three years later.

A skilled seamstress, she made doll clothes and angels for her order's annual bazaar and was a volunteer at St. Joseph Medical Center in Towson.

A Mass of Christian burial will be offered at noon today at Villa Assumpta, 6401 N. Charles St.

She is survived by three sisters, Jeanette Pulsifer of Malden, Mass., Anne Birkenbach of San Diego and Irene Lisowski of La Mesa, Calif.; and three brothers, Philip Fiermonte of Needham, Mass., George Fiermonte of Everett, Mass., and Arthur Fiermonte of Wilmington, N.C.