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Word Meaning Eponym
odyssey A long, wandering journey. Odysseus, the mythological Greek hero of Homer's epic poem, The Odyssey.
oersted A unit of magnetic intensity equal to the magnetic intensity one centimeter from a unit magnetic pole. H. C. Oersted (1777-1851), Danish physicist.
ohm A unit of electrical resistance equal to the resistance of a conductor in which a 1-ampere current is produced by a potential of one volt across its terminals. Georg Simon Ohm (1787-1854), a German physicist who worked extensively with electrical resistance.
onanism 1. Manual stimulation of the genitals. 2. Coitus interruptus. Onan, the son of Judah, as explained in Genesis 38:9.
orrery A mechanical model of the solar system. After Charles Boyle, Fourth Earl of Orrery (1676-1731), for whom one of the first was made.
Oscar The annual award for best performances by the Academy of Motion Picture Arts and Sciences. This name originated in an off-hand remark by the secretary at AMPAS: "He reminds me of my Uncle Oscar," that is, Oscar Pierce, US wheat farmer and fruit grower.
ottoman A soft upholstered footstool. Italian ottomano "Ottoman", the Turkish royal family established by Osman I (1259-1326), sultan of Turkey (1281-1326).
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