focal
61focal length — leŋ(k)th n the distance of a focus from the surface of a lens or concave mirror symbol f * * * the distance between a lens and an object from which all rays of light are brought to a focus. Symbol f …
62focal plane — n a plane that is perpendicular to the axis of a lens or mirror and passes through the focus …
63focal point — n FOCUS (1a) * * * see focus (def. 1), and cardinal p. (def. 1) …
64focal seizure — n PARTIAL SEIZURE * * * partial s …
65focal contact — focal adhesion …
66focal emphysema — focal dust emphysema centriacinar emphysema associated with inhalation of environmental dusts, producing dilatation of the terminal and respiratory bronchioles …
67focal embolic glomerulonephritis — focal glomerulonephritis associated with bacterial endocarditis; see Lцhlein Baehr lesion, under lesion …
68focal glomerular sclerosis — focal segmental glomerulosclerosis …
69focal point — ► NOUN 1) the point at which rays or waves meet after reflection or refraction, or the point from which diverging rays or waves appear to proceed. 2) the centre of interest or activity …
70focal infection — n. a localized infection, as in the gallbladder, teeth, or tonsils, which may spread to other parts of the body through the blood …