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Any one of numerous species of small, polished, brightcolored gastropods of the genus Rotella, native of tropical seas.

g boots and gloves. -- Button shell (Zoöl.), a small, univalve marine shell of the genus Rotella. -- Button snakeroot. (Bot.) (a) The American composite genus Liatris, having rounded buttonlike heads of flowers. (b) An American umbelliferous plant with rigid, narrow leaves, and flowers in dense heads. -- Button tree…