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Definition of Cassideous
1. a. Helmet-shaped; -- applied to a corolla having a broad, helmet-shaped upper petal, as in aconite.
Definition of Cassideous
1. Adjective. (botany) Shaped like a helmet; applied to a corolla with a broad, helmet-shaped upper petal, as in aconite. ¹
¹ Source: wiktionary.com