Definition of buccal in English:



  • 1Relating to the cheek.

    ‘the buccal side of the molars’
    • ‘All cusps bulge slightly on the buccal side, leaving a broad lingual shelf.’
    • ‘Palatal width across the fourth premolar: Greatest breadth across the buccal sides of fourth premolars.’
    • ‘Examination of the intraoral tissues includes inspection and palpation of the lips, buccal mucosa, tongue, floor of the mouth, gingiva and palate.’
    • ‘It is easy to insert the liquid between the cheek and teeth by the buccal rather than the sublingual route’
    • ‘Since this is a lower molar, these cuspids are located on the lingual, rather than the buccal side.’
    1. 1.1Relating to the mouth.
      ‘the buccal cavity’
      • ‘On physical examination, the buccal cavity and the oropharynx appeared normal and no neck lymphadenopathy was identified.’
      • ‘On reaching the gut of the sand fly, the organism converts to a promastigote form, reproduces, and migrates to the buccal cavity.’
      • ‘The first phase is the suction phase, in which the buccal and opercular cavities expand and water is drawn in.’
      • ‘The digestive tract consists of a mouth, buccal cavity, esophagus, stomach, two-section intestine, and anus.’
      • ‘The expansive phase of the strike always began with jaw opening by levator operculi activity followed shortly by buccal cavity expansion through virtually simultaneous firing of the epaxialis and stemohyoideus muscles.’
      • ‘Suction feeding is drawing a single, relatively large prey item into the mouth by a single expansion of the buccal cavity, and is performed only in water.’
      • ‘However, the majority of the bulging to accommodate the engulfed water undoubtedly occurs passively as a result of the inertia of the water (and the rostral compression of the buccal cavity at mouth closure).’
      • ‘Such a mechanism would have been analogous to expansion of the buccal and gular cavities of fishes and many tetrapods by the hyobranchial muscles acting on the hyoid arches.’
      • ‘The sample is either from the mouth - a buccal sample - or a prick of blood from the thumb, any of which is an injury that one would suffer in the normal event of living, and would cause minimal interference or discomfort.’
      • ‘This ensures functional ventral expansion of the buccal cavity.’
      • ‘The female attempts to pick up these false eggs, and, as she nips the male's fins, he ejects sperm into her buccal cavity.’
      • ‘A cephalopod is also characterized by a horny beak secreted by the walls of the buccal cavity, and a radula within the buccal cavity.’
      • ‘Two muscles are key to dorsoventral expansion of the buccal cavity, which characterizes the expansive phase of a suction-feeding event in zebrafish larvae.’
      • ‘Hyperpigmentation in the buccal cavity may be due to racial origin or caused by dental amalgam, drugs, using tobacco or betel, naevi, or, rarely, melanoma’
      • ‘In suction feeding, the hyobranchial apparatus is rapidly depressed while the mouth is opened, expanding the buccal cavity and drawing water and prey into the mouth.’
      • ‘The Platyxanthidae differ from the Eriphiidae in the configuration of the sutures between the sternites, specifically those covered by the abdomen; the nature of the buccal cavity; and the endostome and the epistome.’
      • ‘Also, brooders probably are limited by anatomical constraints (e.g., the size of the brood pouch or buccal cavity), whereas nest tenders may be less constrained in terms of how many adults can contribute gametes to a nest.’
      • ‘Briefly, the expansive phase constitutes a rapid opening of the jaws and expansion of buccal cavity through cranial elevation, hyoid bar depression, and lateral expansion of the suspensorium.’
      • ‘The junction of the pharynx with the body cuticle in wild-type worms involves the cells of the buccal cavity of the pharynx and the hypodermal cell hyp1, which in turn is connected to hyp2.’
      • ‘Many catfishes are accomplished suction feeders with high volume expansion of the buccal cavity and fast jaws, whereas other taxa maximize bite force.’


Early 19th century: from Latin bucca cheek + -al.