focal amyloidosis n.
See nodular amyloidosis.
noun, Linguistics. 1. (in dialect geography) an area whose dialect has exerted influence on the dialects of surrounding areas, as reflected in a set of isoglosses more or less concentrically surrounding it.
- Focal depth
focal depth n. A measure of the power of a lens to produce clear images at different distances from it. Also called depth of focus.
- Focal epilepsy
focal epilepsy n. An epileptic attack in which disturbance of cerebral function causes the twitching of a limb, the occurrence of a somatosensory or special sense phenomenon, or a focal disturbance of complex mental functions. Also called cortical epilepsy.
- Focal glomerulonephritis
focal glomerulonephritis n. Glomerulonephritis affecting only a small proportion of renal glomeruli.