One of 8 permanent grinding teeth, 2 in the upper and 2 in the lower jaw on each side of the mouth, located between the canines and molars. (See also permanent teeth; eruption of teeth.)
            
            Premolar | 
    
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            Premolar | 
    
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             One of 8 permanent grinding teeth, 2 in the upper and 2 in the lower jaw on each side of the mouth, located between the canines and molars. (See also permanent teeth; eruption of teeth.)  | 
    
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