| abandon | (noun) the trait of lacking restraint or control; reckless freedom from inhibition or worry | Synonyms: unconstraint, wantonness |
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| (noun) a feeling of extreme emotional intensity | Synonyms: wildness |
| bombardon | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombard |
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| (noun) a tuba that coils over the shoulder of the musician | Synonyms: helicon |
| bourdon | (noun) a pipe of the bagpipe that is tuned to produce a single continuous tone | Synonyms: drone, drone pipe |
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| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| chaetodon | (noun) any fish of the genus Chaetodon | - |
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| codon | (noun) a specific sequence of three adjacent nucleotides on a strand of DNA or RNA that specifies the genetic code information for synthesizing a particular amino acid | - |
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| cordon | (noun) adornment consisting of an ornamental ribbon or cord | - |
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| (noun) cord or ribbon worn as an insignia of honor or rank | - |
| (noun) a series of sentinels or of military posts enclosing or guarding some place or thing | - |
| cotyledon | (noun) embryonic leaf in seed-bearing plants | Synonyms: seed leaf |
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| dicamptodon | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodontid |
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| dicotyledon | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicot, exogen, magnoliopsid |
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| dimetrodon | (noun) carnivorous dinosaur of the Permian in North America having a crest or dorsal sail | - |
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| don | (noun) teacher at a university or college (especially at Cambridge or Oxford) | Synonyms: preceptor |
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| (noun) the head of an organized crime family | Synonyms: father |
| gladdon | (noun) iris with purple flowers and foul-smelling leaves; southern and western Europe and North Africa | Synonyms: gladdon iris, Iris foetidissima, roast beef plant, stinking gladwyn, stinking iris |
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| guerdon | (noun) a reward or payment | - |
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| gueridon | (noun) a small round table | - |
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| iguanodon | (noun) massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period | - |
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| mastodon | (noun) extinct elephant-like mammal that flourished worldwide from Miocene through Pleistocene times; differ from mammoths in the form of the molar teeth | Synonyms: mastodont |
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| methadon | (noun) synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction | Synonyms: dolophine hydrochloride, fixer, methadone, methadone hydrochloride, synthetic heroin |
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| monocotyledon | (noun) a monocotyledonous flowering plant; the stem grows by deposits on its inside | Synonyms: endogen, liliopsid, monocot |
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| mylodon | (noun) large (bear-sized) extinct edentate mammal of the Pleistocene in South America | - |
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| myrmidon | (noun) a follower who carries out orders without question | - |
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| parallelepipedon | (noun) a prism whose bases are parallelograms | Synonyms: parallelepiped, parallelopiped, parallelopipedon |
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| parallelopipedon | (noun) a prism whose bases are parallelograms | Synonyms: parallelepiped, parallelepipedon, parallelopiped |
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| pardon | (noun) the act of excusing a mistake or offense | Synonyms: forgiveness |
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| (noun) the formal act of liberating someone | Synonyms: amnesty, free pardon |
| (noun) a warrant granting release from punishment for an offense | Synonyms: amnesty |
| radon | (noun) a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health | Synonyms: atomic number 86, Rn |
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| tendon | (noun) a cord or band of inelastic tissue connecting a muscle with its bony attachment | Synonyms: sinew |
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| trachodon | (noun) large duck-billed dinosaur of the Cretaceous period | Synonyms: trachodont |
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