flustrum

== Latin == === Etymology === Postclassical singular version of the usually plurale tantum noun flū̆stra. === Noun === flū̆strum n (genitive flū̆strī); second declension (Medieval Latin, rare) alternative form of flū̆stra (“quiet state of the sea”) ==== Declension ==== Second-declension noun (neuter). === References === === Further reading === "flustrum", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)