Definition of bicuspid in US English:



  • Having two cusps or points.

    • ‘Persons born with a bicuspid aortic valve are predisposed to develop aortic stenosis.’
    • ‘Incisors cut food, and cuspid and bicuspid teeth grasp and tear food.’
    • ‘Causes of dissection include hypertension, Marfan's syndrome, trauma, Ehler's Danlos, coarctation, bicuspid aortic valve and relapsing polychondritis.’
    • ‘The overwhelming cause of aortic valve disease in Europe is calcific degenerative disease, and about 2% of the population have congenitally bicuspid aortic valves.’
    • ‘A score of 2 was given to fully bicuspid dentition, while a score of 3 was given to fully tricuspid dentition, with even cusp heights.’


  • A tooth with two cusps, especially a human premolar tooth.

    • ‘Missing from his upper jaw were three or four bicuspids.’
    • ‘I realized that one of his bicuspids was dead, turning the green-gray of dead teeth.’
    • ‘Behind the canines are the premolars, or bicuspids.’
    • ‘Each of the four ‘worlds’ has two incisors, one canine, two bicuspids, and three molars.’
    • ‘I was a little nervous all weekend about this morning's yank, but the broken bicuspid has come and gone without incident.’


Mid 19th century: from bi- ‘two’ + Latin cuspis, cuspid- ‘sharp point’.