1.NounAny of the genus Sigillaria of fossil trees principally found in the coal formation, with seal-like leaf scars in vertical rows on the surface.
2.NounLittle images or figure made of earthenware or wax sold or given as presents on the last two days of the saturnalia. They were often figures of deities or fruit. In singular, sigillarium
3.NounThe last two days (i.e. the sixth and seventh) of the saturnalia.