found: Maimonides, M. Mishneh Torah, Hilchot chametz uʾmatzah, c1988:t.p. (Matzah) added t.p. (Matsah)
found: Random House(matzo, plural: Matzos; Yiddish: Matse)
found: Britannica Micro.(Matza, plural: Matzot)
found: Encyc. Judaica(Maẓẓah)
found: LC romanization of plural(Matsot)
found: Web 3(unleavened bread eaten at the Passover)
found: Wikipedia, viewed July 19, 2019(under Flatbread; listed: Matzo (Israel); white plain flour and water; variants: Matzah, Matza)
found: Dictionary.com, viewed May 2, 2019(matzo; matzah; matzoh: unleavened bread in the form of large crackers, typically square and corrugated, eaten by Jews during Passover)