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In classical mythology, the peculiarly shaped sword of Hermes, lent by him to Perseus, who with it cut off the head of Medusa.
(noun)
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In entomology, the inwardly projecting armature of the interior of the valves of the genital organs of lepidopterous insects.
(noun)
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[capitalized] In ichthyology, a genus of fishes.
(noun)
The Century Dictionary (Public Domain)