| avian | (adjective) pertaining to or characteristic of birds | - |
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| avianise | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianize |
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| avianize | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianise |
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| aviary | (noun) a building where birds are kept | Synonyms: bird sanctuary, volary |
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| aviate | (verb) operate an airplane | Synonyms: fly, pilot |
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| aviation | (noun) travel via aircraft | Synonyms: air, air travel |
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| (noun) the art of operating aircraft | Synonyms: airmanship |
| (noun) the aggregation of a country's military aircraft | Synonyms: air power |
| (noun) the operation of aircraft to provide transportation | - |
| aviator | (noun) someone who operates an aircraft | Synonyms: aeronaut, flier, flyer |
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| aviatress | (noun) a woman aviator | Synonyms: airwoman, aviatrix |
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| aviatrix | (noun) a woman aviator | Synonyms: airwoman, aviatress |
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