| NAR | nasal airway resistance; National Association for Retarded [Children, Citizens]; no action required |
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| NAS | nasal; National Academy of Sciences; National Association of Sanitarians; neonatal airleak syndrome;... |
| N-CPAP, | n-CPAP nasal continuous positive airway pressure |
| ND | Doctor of Naturopathy; nasal deformity; natural death; Naval Dispensary; neonatal death; neoplastic ... |
| NSR | nasal septal reconstruction; nonspecific reaction; normal sinus rhythm; no sign of recurrence; not s... |
| compound cyst | A cyst containing several compartments formed by membranous septa. Synonym: compound cyst. (05 Mar 2000) |
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| compound dislocation | Synonym: open dislocation. (05 Mar 2000) |
| compound eye | The eye of arthropods, most highly developed in insects and crustaceans; the eye consists of a group of functionally related visual elements (ommatidia) whose corneal surfaces collectively form a segment of a sphere. (05 Mar 2000) |
| compound flap | A flap of 2 or more elements incorporating underlying muscle, bone, or cartilage. (05 Mar 2000) |
| compound fracture | Fracture in which the skin is perforated and there is an open wound down to the fracture. Synonym: compound fracture. (05 Mar 2000) |
| compound gland | A gland whose larger excretory ducts branch repeatedly into smaller ducts, which ultimately drain secretory units. (05 Mar 2000) |
| compound granule cell | A lipid-laden microglial phagocyte commonly seen at the edge of healing brain infarcts, a result of cellular phagocytosis of lipid from necrotic or degenerating brain cells. Synonym: compound granule cell. Origin: Ger. Gitterzelle, fr. Gitter, lattice, wire-net (05 Mar 2000) |
| compound heterozygote | In medical genetics, the presence of two different mutant alleles at the same loci. Synonym: genetic compound. (05 Mar 2000) |
| compound hyperopic astigmatism | Astigmatism in which all meridians are hyperopic but to different degrees. (05 Mar 2000) |
| compound joint | A joint composed of three or more skeletal elements, or in which two anatomically separate joints function as a unit. For example, the telonavicular and calcaneocuboid joints act together as the compound transverse tarsal joint. Synonym: articulatio complexa, articulatio composita, composite joint, compound articulation. (05 Mar 2000) |
| compound lens | An optical system of two or more lenses. (05 Mar 2000) |
| compound lipids | Lipids containing N and P atoms in addition to the usual C, H, and O. Compare: homolipids. Synonym: compound lipids. (05 Mar 2000) |
| compound microscope | <instrument> A microscope (an optical instrument that augments the power of the eye to see small objects) which consists of two microscopes in series, the first serving as the ocular lens (close to the eye) and the second serving as the objective lens (close to the object to be viewed). Credit for creating the compound microscope goes usually to the Dutch spectaclemakers Hans and Zacharias Janssen who in 1590 invented an instrument that could be used as either a microscope or telescope. The compound microscope has evolved into the dominant type of optical microscope today. (12 Dec 1998) |
| compound myopic astigmatism | Astigmatism in which all meridians are myopic but to different degrees. (05 Mar 2000) |
| compound name | <zoology> One that is formed by the union of two or more basic components, excluding prefixes and suffixes. For example striatoradiatus, novaeguineae, fritzmuelleri, c-album (09 Jan 1998) |