| horizontal resorption | A progressive loss of alveolar and supporting bone surrounding the teeth, beginning at the most coronal level of the bone. Synonym: horizontal resorption. (05 Mar 2000) |
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| bone resorption | Bone loss due to osteoclastic activity. (12 Dec 1998) |
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| gingival resorption | The exposure of root surface by an apical shift in the position of the gingiva. (12 Dec 1998) |
| resorption | <physiology> The loss of substance through physiologic or pathologic means, such as loss of dentin and cementum of a tooth or of the alveolar process of the mandible or maxilla. Origin: L. Resorbere = to swallow again (10 Mar 1998) |
| resorption atelectasis | The slow partial collapse of a lobe that occurs when communication between alveoli and trachea is obstructed. (05 Mar 2000) |
| resorption lacunae | Tiny depressions, pits, or irregular grooves in bone that is being resorbed by osteoclasts. Synonym: resorption lacunae. (05 Mar 2000) |
| ridge resorption | A loss in the volume and size of the alveolar portion of the mandible or maxilla. (05 Mar 2000) |
| root resorption | Resorption in which cementum or dentin is lost from the root of a tooth owing to cementoclastic or osteoclastic activity in conditions such as trauma of occlusion or neoplasms. (12 Dec 1998) |
| internal resorption | A loss of tooth structure originating within the pulp cavity. (05 Mar 2000) |
| tooth resorption | Resorption of calcified dental tissue, involving demineralization due to reversal of the cation exchange and lacunar resorption by osteoclasts. There are two types: external (as a result of tooth pathology) and internal (apparently initiated by a peculiar inflammatory hyperplasia of the pulp). (12 Dec 1998) |
| embryo resorption | Death and resorption of the embryo that takes place at any developmental stage after ovum implantation and before the completion of organogenesis. does not include foetal resorption. (12 Dec 1998) |
| foetal resorption | <obstetrics> Death and resorption of the foetus at any stage after the completion of organogenesis. It does not include embryo resorption. (12 Dec 1998) |
| palatine surface of horizontal plate of palatine bone | The inferior surface of the horizontal plate of the palatine bone. Synonym: facies palatina laminae horizontalis ossis palatini. (05 Mar 2000) |
| medial crus of the horizontal part of the facial canal | Medially-placed, anteriorly-directed first portion of the horizontal part of the facial canal. See: horizontal part of facial canal. Synonym: medial crus of the horizontal part of the facial canal. (05 Mar 2000) |
| great horizontal fissure | Horizontal fissure that divides the ansiform lobule into its major parts, crus I (superior semilunar lobule) and crus II (inferior semilunar lobule). Synonym: fissura horizontalis cerebelli, great horizontal fissure. (05 Mar 2000) |
| horizontal | 1. Pertaining to, or near, the horizon. "Horizontal misty air." 2. Parallel to the horizon; on a level; as, a horizontalline or surface. 3. Measured or contained in a plane of the horizon; as, horizontal distance. Horizontal drill, a drilling machine having a horizontal drill spindle. Horizontal engine, one the piston of which works horizontally. Horizontal fire, the fire of ordnance and small arms at point-blank range or at low angles of elevation. <physics> Horizontal force, the distance in a horizontal plane to which a gun will throw a projectile. Horizontal water wheel, a water wheel in which the axis is vertical, the buckets or floats revolving in a horizontal plane, as in most turbines. Origin: Cf. F. Horizontal. Source: Websters Dictionary (01 Mar 1998) |