| tulip-shell | <zoology> A large, handsomely coloured, marine univalve shell (Fasciolaria tulipa) native of the Southern United States. The name is sometimes applied also to other species of Fasciolaria. Source: Websters Dictionary (01 Mar 1998) |
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| turban-shell | <zoology> A sea urchin when deprived of its spines; popularly so called from a fancied resemblance to a turban. Source: Websters Dictionary (01 Mar 1998) |
| turnip-shell | <zoology> Any one of several large, thick, spiral marine shells belonging to Rapa and allied genera, somewhat turnip-shaped. Source: Websters Dictionary (01 Mar 1998) |
| tusk-shell | <zoology> See Tusk. Source: Websters Dictionary (01 Mar 1998) |
| K shell | The innermost electron orbit or shell; it can hold two electrons. (05 Mar 2000) |
| fig-shell | <zoology> A marine univalve shell of the genus Pyrula, or Ficula, resembling a fig in form. Source: Websters Dictionary (01 Mar 1998) |
| acrylic resin tooth | A tooth made of acrylic resin. (05 Mar 2000) |
| ankylosed tooth | <dentistry> Bony union of the radicular surface of a tooth to the surrounding alveolar bone in an area of previous partial root resorption. Extracapsular ankylosis, stiffness of a joint due to induration or heterotopic ossification of the surrounding tissues. Synonym: spurious ankylosis. (05 Mar 2000) |
| apex of cusp of tooth | The tip of the peaklike projections from the crown of a tooth. Synonym: apex cuspidis dentis. (05 Mar 2000) |
| apical foramen of tooth | The opening at the apex of the root of a tooth that gives passage to the nerve and blood vessels. Synonym: foramen apicis dentis, apical dental foramen, root foramen. (05 Mar 2000) |
| baby tooth | A tooth of the first set of teeth, comprising 20 in all, that erupts between the mean ages of 6 and 28 months of life. Synonym: dens deciduus, baby tooth, deciduous dentition, dens lacteus, first dentition, milk tooth, primary dentition, primary tooth, temporary tooth. (05 Mar 2000) |
| bicuspid tooth | A tooth usually having two tubercles or cusps on the grinding surface and a flattened root, single in the lower jaw and upper second premolar, and furrowed in the upper first premolar. There are four premolars in each jaw, two on either side between the canine and the molars; there are no premolars in the deciduous dentition. Synonym: dens premolaris, bicuspid tooth, dens bicuspidus. (05 Mar 2000) |
| buck tooth | An anterior tooth in labioversion. (05 Mar 2000) |
| canine tooth | <dentistry> A tooth having a crown of thick conical shape and a long, slightly flattened conical root; there are two canine teeth in each jaw, one on either side adjacent to the distal surface of the lateral incisors, in both the deciduous and the permanent dentition. Synonym: dens caninus, canine, cuspid tooth, cuspidate tooth, cuspid, dens angularis, dens cuspidatus, eye tooth. (05 Mar 2000) |
| carnassial tooth | A tooth adapted to shear flesh; the last upper premolar or first lower molar tooth of certain carnivores. (05 Mar 2000) |