
1) Ancient Roman festival
Found on
https://www.crosswordclues.com/clue/sigillaria

Sigillaria is a genus of extinct, spore-bearing, arborescent (tree-like) plants which flourished in the Late Carboniferous period but dwindled to extinction in the early Permian period. It was a lycopodiophyte, and is related to the lycopsids, or club-mosses, but even more closely to quillworts, as was its associate Lepidodendron. Sigillaria was a...
Found on
http://en.wikipedia.org/wiki/Sigillaria
[ancient Rome] In ancient Roman culture, sigillaria were pottery or wax figurines given as traditional gifts during the Saturnalia. Sigillaria as a proper noun was also the name for the last day of the Saturnalia, December 23, and for a place where sigillaria were sold. A sigillarius was a person who made and sold sigillaria, perhaps as an ...
Found on
http://en.wikipedia.org/wiki/Sigillaria_(ancient_Rome)

• (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. • (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 Satu...
Found on
http://thinkexist.com/dictionary/meaning/sigillaria/

a genus of extinct treelike club mosses, order Lepidodendrales (class Lycopsida). Dating from the Carboniferous Period (360 million to 286 million ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/s/93
Sig`il·la'ri·a noun plural [ Latin , from
sigillum a seal. See
Sigil .]
(Rom. Antic.) 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...
Found on
http://www.encyclo.co.uk/webster/S/100
No exact match found.