| cleansing cream | A form of cold cream used to remove grime and cosmetics from the skin. (05 Mar 2000) |
|---|---|
| clear cell | A cell in which the cytoplasm appears empty with the light microscope, as occurs in certain secretory cells of eccrine sweat glands and in the parathyroid glands when the glycogen is unstained, any cell, particularly a neoplastic one, containing abundant glycogen or other material that is not stained by haematoxylin or eosin, so that the cell cytoplasm is very pale in routinely stained sections. (05 Mar 2000) |
| clear cell acanthoma | A sharply demarcated benign epidermal lesion of a leg or arm with acanthosis and accumulation of glycogen in keratinocytes having pale staining cytoplasm. (05 Mar 2000) |
| clear cell adenocarcinoma | <tumour> A histologic type of renal adenocarcinoma. A histologic type of adenocarcinoma occurring chiefly in the male and female genitourinary tracts which is characterised by distinctive hobnail cell growth of neoplastic cells in sheets, papillae, and coalescing glands. (05 Mar 2000) |
| clear cell carcinoma of kidney | <radiology> Hypernephroma, renal cell carcinoma, arises from proximal collecting tubule, 10% bilateral adenocarcinoma types: papillary, alveolar, onchocytoma vascularity, 85% hypervascular (require pre-op embolization), 10% hypovascular (usually papillary type), 5% avascular associated with: tuberous sclerosis, von Hippel-Lindau syndrome see also: staging (12 Dec 1998) |
| clear cell hidradenoma | <tumour> A tumour derived from eccrine sweat glands, composed of glycogen-rich clear cells. Synonym: eccrine acrospiroma, nodular hidradenoma. (05 Mar 2000) |
| clear layer of epidermis | A layer of lightly staining corneocytes in the deepest level of the stratum corneum; found primarily in the thick epidermis of the palmar and plantar skin. Synonym: clear layer of epidermis. (05 Mar 2000) |
| clear liquid diet | A diet, often used postoperatively, consisting usually of water, tea, coffee, gelatin preparations, and clear soups or broth. (05 Mar 2000) |
| clearance | 1. The process of clearing. 2. <physiology> The rate at which a substance is removed from the blood. (18 Nov 1997) |
| clearcut | The removal, in a single cutting, of the entire stand of trees within a designated area. Stand regeneration is accomplished by planting the site or by natural seeding from adjacent stands. (05 Dec 1998) |
| clearer | An agent, used in histological preparations, which is miscible in both the dehydrating or fixing fluid and the embedding substance. (05 Mar 2000) |
| clearing factors | Lipoprotein lipases that appear in plasma during lipaemia and catalyze hydrolysis of triglycerides only when the latter are bound to protein and when an acceptor (e.g., serum albumin) is present, thus "clearing" the plasma. (05 Mar 2000) |
| clearing medium | A medium used in histology for making specimens translucent or transparent. (05 Mar 2000) |
| cleavage | <cell biology> The early divisions of the fertilized egg to form blastomeres. The cleavage pattern is radial in some phyla, spiral in others. (18 Nov 1997) |
| cleavage cavity | The cavity in the blastula of a developing embryo. Synonym: blastocoele, cleavage cavity, segmentation cavity. Origin: blasto-+ G. Koilos, hollow (05 Mar 2000) |