| anode | <microscopy> The electrode to which a major flow of electrons takes place internally (as in a cathode-ray tube) or to which an external positive voltage supply is connected. (05 Aug 1998) |
|---|---|
| anode rays | Those originating in a gas discharge tube and moving in a direction opposite to that of cathode ray's; made up of positively charged ions. Synonym: positive rays. (05 Mar 2000) |
| anoderm | Lining of the anal canal immediately inferior to the dentate line and extending for about 1.5 cm. To the anal verge; it is devoid of hair and sebaceous and sweat glands, and so is not true skin, although it is squamous epithelium; it is pale, smooth, thin, and delicate, and shiny when stretched; it is especially vulnerable to abrasion (as from rough toilet paper), chemical irritants (soaps), and is well-provided with tactile and nociceptive (pain, itch) endings innervated by the inferior rectal (pudendal) nerve. (05 Mar 2000) |
| rotating anode | In diagnostic radiography, modern X-ray tubes that have a mushroom-shaped anode that rotates rapidly to avoid local heat buildup from electron impact during X-ray generation. (05 Mar 2000) |
|---|---|
| rotating anode tube | A modern X-ray tube, in which heat buildup is distributed through a larger volume by rotating the target. (05 Mar 2000) |