See Also: opto-(medicine)
opto-(dictionary)
opto(dictionary)
Lazio(encyclopedia)
Lazio(tourism)
Lazio hotels(tourism)

opto- (iou) and Lazio (sh)


opto- (iou)



opto- combining form.
[Greek optos seen, visible: see -O-.]
Forming (chiefly scientific) words with the sense 'of sight or vision, optic'.
optoa'coustic adjective designating, pertaining to, or involving the effect whereby a light beam periodically interrupted at an Audio frequency produces sound when made to irradiate an enclosed body of gas L20.
opto-'coupler noun (Electronics) a device containing light-emitting and light-sensitive components, used to couple isolated circuits L20.
optoelec'tronic adjective involving or pertaining to the interconversion or interaction of light and electronic signals M20.
optoelec'tronics noun the study and application of optoelectronic effects M20.
optotype noun (Ophthalmology) a letter or figure of definite size used for testing acuteness of vision; a test-type: L19.

Lazio (sh)




Region (pop., 2001 prelim.: 4,976,184), west-central Italy, fronting the Tyrrhenian Sea.

Established in 1948, it covers an area of 6,642 sq mi (17,203 sq km); its capital is Rome. In the east are the central Apennines, and in the west lies a coastal plain. Until the late 19th century, most of its lowlands were marshy and malarial, but in the early 20th century these lands were drained and repopulated. Situated in the region previously known as Latium, it supports light industry, but the area is dominated by Rome.