| sublingual pit | A shallow depression on either side of the mental spine, on the inner surface of the body of the mandible, superior to the mylohyoid line, lodging the sublingual gland. Synonym: fovea sublingualis, sublingual pit. (05 Mar 2000) |
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| sublingual tablet | Usually a small, flat tablet intended to be inserted beneath the tongue, where the active ingredient is absorbed directly through the oral mucosa; such a tablet (e.g., nitroglyerine)dissolves very promptly. (05 Mar 2000) |
| sublingual vein | <anatomy, vein> Vein which accompanies the sublingual artery in the floor of the mouth, lateral to the hypoglossal nerve; it may join the deep lingual vein to form the lingual vein, or join the vena comitans nerve hypoglossi. Synonym: vena sublingualis. (05 Mar 2000) |
| alveolar ridge | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| alveolar ridge augmentation | Preprosthetic surgery involving rib, cartilage, or iliac crest bone grafts, usually autologous, or synthetic implants for rebuilding the alveolar ridge. (12 Dec 1998) |
| apical ectodermal ridge | The layer of surface ectodermal cells at the apex of the embryonic limb bud; considered to exert an inductive influence on the condensation of underlying mesenchyme. (05 Mar 2000) |
| basal ridge | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| buccocervical ridge | A convexity within the cervical third of the buccal surface of molars. (05 Mar 2000) |
| buccogingival ridge | A distinct ridge on the buccal surface of a deciduous molar tooth, approximately 1.5 mm from the crown-root junction. (05 Mar 2000) |
| bulbar ridge | One of two spiral subendocardial thickenings in the embryonic bulbus cordis; when they fuse, they divide the bulbus into the aorta and pulmonary artery. (05 Mar 2000) |
| bulboventricular ridge | An elevation on the inner surface of the embryonic heart at four to five weeks; it indicates the division between the developing ventricles and the bulbus cordis. (05 Mar 2000) |
| palatine ridge | A rather narrow, low elevation in the centre of the hard palate that extends from the incisive papilla posteriorly over the entire length of the mucosa of the hard palate. Synonym: raphe palati, palatine ridge. (05 Mar 2000) |
| ganglion ridge | A group of embryonic cells that separate from the neural plate during neurulation and migrate to give several different lineages of adult cells: the spinal and autonomic ganglia, the glial cells of the peripheral nervous system and nonneuronal cells, such as chromaffin cells, melanocytes and some haemopoietic cells. (18 Nov 1997) |
| mammary ridge | Bandlike thickening of ectoderm in the embryo extending on either side from just below the axilla to the inguinal region; in human embryos, the mammary glands arise from primordia in the thoracic part of the ridge, the balance of the ridge disappearing; in some lower mammals which give birth to a litter of young, several milk glands develop along these lines. Synonym: mammary fold, milk line, milk ridge. (05 Mar 2000) |
| marginal ridge | The rounded borders which form the mesial and distal margins of the occlusal surface of a tooth. Synonym: crista marginalis, marginal ridge. (05 Mar 2000) |