Definition of Focal length

1. Noun. The distance from a lens to its focus.

Exact synonyms: Focal Distance
Generic synonyms: Distance

Definition of Focal length

1. Noun. (optics) The distance at which something (e.g. a lens, mirror etc.) is in focus; in air it is the distance along the optical axis from a "principal plane" of the lens to one of the lens's focal points. ¹

¹ Source: wiktionary.com

Medical Definition of Focal length

1. The distance from the optical centre of the lens to the focal point The focal length of an objective and its working distance are directly proportional. (05 Aug 1998)

Lexicographical Neighbors of Focal Length

focal appendicitis
focal condensing osteitis
focal depth
focal depths
focal dermal hypoplasia
focal distance
focal embolic glomerulonephritis
focal epilepsy
focal epithelial hyperplasia
focal gallbladder wall thickening
focal gigantism
focal glomerulonephritis
focal illumination
focal infection
focal interval
focal length (current term)
focal lengths
focal lymphocytic thyroiditis
focal metastatic disease
focal motor seizure
focal necrosis
focal nephritis
focal nodular hyperplasia
focal plane
focal point
focal points
focal ratio
focal reaction
focal sclerosing glomerulopathy
focal sclerosis

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