OPA



U.S. Government.
1.
Office of Price Administration: the federal agency (1941–46) charged with regulating rents and the distribution and prices of goods during World War II.
1.
Office of Population Affairs
2.
Orthopedic Practice Assembly

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  • Opac

    Online Public Access Catalog

  • Opacification

    [oh-pas-uh-fahy] /oʊˈpæs əˌfaɪ/ verb (used with object), opacified, opacifying. 1. to cause to become opaque. verb (used without object), opacified, opacifying. 2. to become opaque. opacification o·pac·i·fi·ca·tion (ō-pās’ə-fĭ-kā’shən) n.



  • Opacify

    [oh-pas-uh-fahy] /oʊˈpæs əˌfaɪ/ verb (used with object), opacified, opacifying. 1. to cause to become opaque. verb (used without object), opacified, opacifying. 2. to become opaque.

  • Opacities

    [oh-pas-i-tee] /oʊˈpæs ɪ ti/ noun, plural opacities. 1. the state or quality of being . 2. something . 3. the degree to which a substance is ; capacity for being . 4. Photography. the proportion of the light that is absorbed by the emulsion on any given area of a film or plate. 5. obscurity […]



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