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Definition of Sigillarid
1. n. One of an extinct family of cryptagamous trees, including the genus Sigillaria and its allies.
Definition of Sigillarid
1. Noun. (paleontology) One of an extinct family of cryptogamous trees, including the genus ''Sigillaria'' and its allies. ¹
¹ Source: wiktionary.com
Medical Definition of Sigillarid
1.