| class II | Perennial or intermittent streams that are used by fish for spawning, rearing, or migration. Class II streams may be tributaries to Class I streams or other Class II streams. (05 Dec 1998) |
|---|---|
| class II antigens | A cell membrane glycoprotein encoded by genes of the major histocompatibility complex. These antigens are distributed on antigen-presenting cells such as macrophages, B-cells, and dendritic cells. (05 Mar 2000) |
| class II malocclusion | <dentistry> A Malocclusion where your upper teeth stick out past your lower teeth. This is also called an overbite or buck teeth (05 Mar 2000) |
| class III | All other perennial streams not meeting higher class criteria. (05 Dec 1998) |
| class III antigens | Non-cell membrane molecules that are encoded by the S region of the major histocompatibility complex. These antigens are not involved in determining histocompatibility and include the complement proteins. (05 Mar 2000) |
| class III malocclusion | <dentistry> A Malocclusion where your lower teeth stick out past your upper teeth. This is also called an underbite. (05 Mar 2000) |
| class iv | All other intermittent streams not meeting higher class criteria. (05 Dec 1998) |
| class switch | Change in the isotype of antibody produced after a B-cell has encountered an antigen. (05 Mar 2000) |
| classic | Of first class of rank, standard. (18 Nov 1997) |
| classic cervical rib syndrome | <syndrome> Very chronic axon loss brachial plexopathy, caused by compromise of the lower trunk fibres by a congenital band extending from a rudimentary cervical rib to the first thoracic rib; rare disorder, found mostly in young to middle-aged women, that presents with unilateral hand wasting and weakness, particularly involving the lateral thenar eminence; sometimes accompanied by intermittent discomfort along the medial forearm and hand. Synonym: cervical rib and band syndrome, classic cervical rib syndrome. (05 Mar 2000) |
| classic migraine | A form of hemicrania migraine preceded by a scintillating scotoma (teichopsia). (05 Mar 2000) |
| classical article | The current presentation of a previously printed seminal article marking a milestone in the history of medicine or science. It is usually accompanied by introductory remarks heralding its reprinting, often on the anniversary of its original publication or on an anniversary of the author's birth or death. It is usually reprinted in full, with complete bibliographical reference to the original appearance. (12 Dec 1998) |
| classical cesarean section | A cesarean section in which the uterus is entered through a vertical fundal incision. (05 Mar 2000) |
| classical conditioning | <psychology> Learning that takes place when a conditioned stimulus is paired with an unconditioned stimulus. (12 Dec 1998) |
| classical confinement | <radiobiology> Plasma confinement in which particle and energy transport occurs via classical diffusion, best possible case for magnetically confined plasmas. See: classical diffusion. (09 Oct 1997) |