| form | 1. <zoology> An infrasubspecific category which has no status in the classification code. 2. <suffix> In the form, shape of, mold; equivalent to -oid. See: morpho-. Origin: L. -formis, L. Forma (20 Jun 2000) |
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| form perception | The sensory discrimination of a pattern shape or outline. (12 Dec 1998) |
| L form | L-forms are bacterial spheroplasts or protoplasts originating from normal bacteria following partial (spheroplasts) or complete (protoplasts) removal of the cell wall. The formation of L-forms can be either spontaneous, occuring during certain phase of growth, or artificial due to suppression of the rigid cell wall by stimuli such as enzymes, heat-shock, or special L form induction medium etc. Bacterial genera from which L-forms have been derived include: Agrobacterium, Bacillus, Bacterodes, Bartonella, Bordetella, Brucella, Clostridium, Corynebacterium, Erysipelothrix, Escherichia, Flavobacterium, Haemophilus, Listeria, Neisseria, Proteus, Pseudomonas, Salmonella, Sarcina, Serratia, Shigella, Staphylococcus, Streptobacillus, Streptococcus, and Vibrio. (14 Oct 1997) |
| abnormal occlusion | An arrangement of the teeth which is not considered to be within the normal range of variation. (05 Mar 2000) |
| acute vascular occlusion | <cardiology, surgery> A serious condition that results from the sudden blockage of an artery, usually with a blood clot. (27 Sep 1997) |
| afunctional occlusion | A malocclusion which does not permit normal function of the dentition. (05 Mar 2000) |
| anterior occlusion | The occlusion of anterior teeth. Synonym: mesial occlusion. (05 Mar 2000) |
| aortic occlusion | A blockage of the aorta somewhere along its path. This can result in irreversible damage to the organs which depend on aortic blood below the level of the blockage. See: atherosclerosis. (27 Sep 1997) |
| balanced occlusion | The simultaneous contacting of the upper and lower teeth on the right and left and in the anterior and posterior occlusal areas in centric and eccentric positions within the functional range; used primarily in reference to the mouth, but also arranged and observed on articulators, developed to prevent a tipping or rotating of the denture bases in relation to the supporting structures. Synonym: balanced articulation, balanced bite. (05 Mar 2000) |
| bimaxillary protrusive occlusion | An occlusion in which both the maxilla and mandible protrude, causing the long axes of the maxillary anterior teeth to be at an extremely acute angle to the mandibular teeth; may be secondary to a skeletal or dental deformity, or both; seen commonly in blacks. (05 Mar 2000) |
| buccal occlusion | Malposition of a tooth toward the cheek, the occlusion as seen from the buccal side of the teeth. (05 Mar 2000) |
| vascular occlusion | A sudden blockage of a blood vessel usually with a blood clot. Blockage of a vein results in deep venous thrombosis. Blockage of an artery results in a surgical emergency. (27 Sep 1997) |
| gliding occlusion | <dentistry> The contact relationship of the occlusal surfaces of the upper and lower teeth when moving into and away from centric occlusion. Synonym: gliding occlusion. (05 Mar 2000) |
| mechanically balanced occlusion | A balanced occlusion without reference to physiologic considerations, as on an articulator. (05 Mar 2000) |
| pathogenic occlusion | An occlusal relationship capable of producing pathologic changes in the supporting tissues. (05 Mar 2000) |