(n.) The arctic fulmar (Fulmarus glacialis). Sometimes also applied to other sea birds.
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(n.) An old game at cards.
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(n.) A simpleton; a fool.
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(n.) Any tern of the genus Anous, as A. stolidus.
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(n.) An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; -- used for detecting and measuring slight horizontal vibrations of a body to which it is attached.