Sigillaria

Webster's Dictionary

(1): (n.) A genus of fossil trees principally found in the coal formation; - so named from the seallike leaf scars in vertical rows on the surface.

(2): (n. pl.) Little images or figures of earthenware exposed for sale, or given as presents, on the last two days of the Saturnalia; hence, the last two, or the sixth and seventh, days of the Saturnalia.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

the last two days of the feast of Saturn, so called from little earthenware figures (sigilla) exposed for sale at this season, and given as toys to children. (See Saturnalia).