Definitions from Wiktionary (Rf)

▸ noun:  (US, military, aviation) reconnaissance fighter; an unarmed fighter modified for photo-reconnaissance (prefix)
▸ noun:  Initialism of right foot.
▸ noun:  (photography) Initialism of range finder.
▸ noun:  (electronics, physics) Initialism of radio frequency. [(uncountable) That part of the electromagnetic spectrum, between about 3 kHz and 300 MHz, within which radio waves are transmitted.]
▸ noun:  (pathology) Initialism of rheumatoid factor. [(immunology) An autoantibody directed against the Fc fragment of immunoglobulin G (IgG), often elevated in certain conditions including rheumatoid arthritis and Sjögren's syndrome.]
▸ noun:  (military, engineering, slang) Initialism of ratfuck (“dirty rick or act of sabotage or interference”). [(vulgar) Someone who engages in dirty tricks.]
▸ noun:  (baseball) Initialism of right field or right fielder.
▸ noun:  (optics, imaging, photography) Abbreviation of radiance field.
▸ noun:  Initialism of Russian Federation. [Alternative formal name of Russia.]
▸ noun:  Initialism of radio frequency. [(uncountable) That part of the electromagnetic spectrum, between about 3 kHz and 300 MHz, within which radio waves are transmitted.]





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