OPA

Opa may refer to:

Arts and media

Fictional characters and entities

Film

Music

Laws and international agreements

Organizations

Government agencies

Other organizations

People

Science and technology

Chemistry and physics

  • OPA, a mixture used in chemical weapons such as M687
  • Ortho-phthalaldehyde, a dialdehyde used in the synthesis of heterocyclic compounds and a reagent in the analysis of amino acids
  • Optical parametric amplifier, a laser light source that emits light of variable wavelengths

Computing

Medicine

Other uses

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