n :  either of two oily liquid isomeric ketones C₁₃H₂₀O that have a strong odor of violets, are found esp. in the essential oil of an Australian shrub (Boronia megastigma) but are usu. obtained from citral, and are used esp. in perfumes .
 
 
 
Similar sounding terms:  in·i·on 
 
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