| top-shell | <zoology> Any one of numerous species of marine top_shaped shells of the genus Thochus, or family Trochidae. Source: Websters Dictionary (01 Mar 1998) |
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| trough-shell | <zoology> Any bivalve shell of the genus Mactra. See Mactra. Source: Websters Dictionary (01 Mar 1998) |
| tube-shell | <zoology> Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell. Source: Websters Dictionary (01 Mar 1998) |
| 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) |
| 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) |
| administration, oral | The giving of drugs, chemicals, or other substances by mouth. (12 Dec 1998) |
| cancer, oral | Cancer of the mouth area. A sore in the mouth that does not heal can be a warning sign of oral cancer. A biopsy is the only to know whether as abnormal area in the oral cavity is cancer. Oral cancer is caused by tobacco (smoking and chewing) and alcohol use. Surgery to remove the tumour in the mouth is the usual treatment for patients with oral cancer. (12 Dec 1998) |
| candidiasis, oral | Infection of the mucous membranes of the mouth by a fungus of the genus candida. (12 Dec 1998) |
| canine oral papilloma | Warts affecting mucous membranes of young dogs; caused by a papillomavirus. (05 Mar 2000) |
| magnesia and alumina oral suspension | A mixture of magnesium hydroxide and variable amounts of aluminum oxide; used as an antacid. (05 Mar 2000) |
| pathology, oral | A dental specialty concerned with pathology of the oral cavity. (12 Dec 1998) |