The Collaborative International Dictionary of English v.0.48:

Sigillaria \Sig`il*la"ri*a\, n. pl. [L., 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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sigillaria \Sig`il*la"ri*a\, n. [NL., fem sing. fr. L. sigillum
   a seal.] (Paleon.)
   A genus of fossil trees principally found in the coal
   formation; -- so named from the seallike leaf scars in
   vertical rows on the surface.
   [1913 Webster]