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  • (acoustics) The frequency a wireless radio frequency system operates at. A fixed radio frequency that's modulated (shifted up and down) in either frequency (FM) or in level (AM) by the audio signal.
    Source: Church Audio & Acoustics Glossary
  • (agriculture) An inert material added to an active ingredient in a pesticide to enhance its delivery or effectiveness.
  • (biology) a phenotypically normal individual heterozygous for a normal allele and a mutant allele
    Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
  • (electronics) A signal capable of being modulated to carry information.

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