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| rounded brimless cap fitting the crown of the head | |||
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| a hemispherical roof | |||
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| a sucker on the feet of certain flies | |||
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| the part of a hat (the vertex) that covers the crown of the head | |||
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| a roof in the form of a dome | |||
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| cup-shaped structure of hardened bracts at the base of an acorn |