| tumor | 1. <oncology> An abnormal mass of tissue that results from excessive cell division that is uncontrolled and progressive, also called a neoplasm. Tumours perform no useful body function. They may be either benign (not cancerous) or malignant. 2. Swelling, one of the cardinal signs of inflammations, morbid enlargement. Origin: L. Tumere = to swell (12 May 1997) |
|---|---|
| tumor marker | <investigation, oncology> A substance in the body that usually indicates the presence of cancer. These markers are usually specific to certain types of cancer and are usually found in the blood or other tissue samples. Examples are alphafetoprotein (AFP), human chorionic gonadotropin, and lactate dehydrogenase (LDH). They may be indicators of tumour stage and grade as well as useful for monitoring responses to treatment and predicting recurrence. Many chemical groups are represented including hormones, antigens, amino and nucleic acids, enzymes, polyamines, and specific cell membrane proteins and lipids. (18 Jul 2002) |
| tumor necrosis factor | <cytokine> Originally described as a tumour inhibiting factor in the blood of animals exposed to bacterial lipopolysaccharide or Bacille Calmette-Guerin. Preferentially kills tumour cells in vivo and in vitro, causes necrosis of certain transplanted tumours in mice and inhibits experimental metastases. Human Tumour Necrosis factor alpha is a protein of 157 amino acids and has a wide range of pro inflammatory actions. Usually considered a cytokine. Synonym: cachectin. Acronym: TNF (13 Nov 1997) |
| Bordet-Gengou potato blood agar | Glycerine-potato agar with 25% of blood, used for the isolation of Bordetella pertussis. (05 Mar 2000) |
| potato | Origin: Sp. Patata potato, batata sweet potato, from the native American name (probably batata) in Hayti. <botany> A plant (Solanum tuberosum) of the Nightshade family, and its esculent farinaceous tuber, of which there are numerous varieties used for food. It is native of South America, but a form of the species is found native as far north as new Mexico. The sweet potato (see below). Potato beetle, Potato bug. The large green larva of a sphinx, or hawk moth (Macrosila quinquemaculata); called also tomato worm. <botany> Seaside potato A vine (Ipomoea pandurata) having a pale purplish flower and an enormous root. It is common in sandy places in the United States. A similar tropical American plant (I. Fastigiata) which it is thought may have been the original stock of the sweet potato. Source: Websters Dictionary (01 Mar 1998) |
| potato dextrose agar | A culture medium used extensively for the cultivation of fungi; especially good for development of conidia and other sporulating forms by which an organism is identified microscopically. (05 Mar 2000) |
| potato lectin | <protein> Lectin from the potato, Solanum tuberosum. Binds to N acetyl glucosaminyl residues. (18 Nov 1997) |
| potato nose | A manifestation of severe acne rosacea resulting in significant enlargement of the nose and occurring primarily in men. It is caused by hypertrophy of the sebaceous glands and surrounding connective tissue. The nose is reddened and marked with numerous telangiectasias. (12 Dec 1998) |
| potato tumour of neck | A firm nodular mass in the neck, usually a carotid body tumour (chemodectoma). (05 Mar 2000) |