Definition of premolar in US English:



  • A tooth situated between the canine and the molar teeth. An adult human normally has eight, two in each jaw on each side.

    • ‘It is common knowledge that the tongue partly rests between the bones that form the jaw, and to be more precise, between the dental rows (incisors, canines, premolars and molars) and on the floor of the mouth.’
    • ‘All rodents have a single pair of upper and a single pair of lower incisors, followed by a gap, followed by one or more molars or premolars.’
    • ‘In the mandible, there are, in front, four incisors, two canines, four premolars, and six molars behind.’
    • ‘It consists of isolated upper and lower premolars and molars as well as upper and lower dental series with good preservation.’
    • ‘Behind the canines are the premolars, or bicuspids.’
    • ‘That is, one of its ‘baby teeth’, the second premolar, instead of being lost, was withdrawn and turned so it buttressed a large adult tooth, the third premolar.’
    • ‘The well-preserved teeth - incisors, canines, premolars, and molars - look to have been ideal for feeding on fish and aquatic invertebrates, somewhat like the teeth of modern seals.’
    • ‘The normal permanent dentition comprises four incisors, two canines, four premolars, and six molars in each jaw.’