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  2. Opa (expression) - Wikipedia

    en.wikipedia.org/wiki/Opa_(expression)

    Opa (Greek: ώπα) is a common Mediterranean, Eastern European, Middle Eastern, North African, South Asian, South American, Central American, and Jewish emotional expression. It is frequently used during celebrations such as weddings or traditional dancing . [ 1 ]

  3. Oropharyngeal airway - Wikipedia

    en.wikipedia.org/wiki/Oropharyngeal_airway

    An oropharyngeal airway (also known as an oral airway, OPA or Guedel pattern airway) is a medical device called an airway adjunct used in airway management to maintain or open a patient's airway. It does this by preventing the tongue from covering the epiglottis , which could prevent the person from breathing.

  4. List of South African slang words - Wikipedia

    en.wikipedia.org/wiki/List_of_South_African...

    While the original English meaning stays intact, it can also refer to a big mess. Whether it be messy hair, a messy bedroom or a loud and messy gathering, like a party. kreef – literally means "crayfish" but it refers to a promiscuous woman with the intent to attract men. kry 'n kramp! – lit. "get a cramp". A definitive expression of strong ...

  5. List of Latin abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_Latin_abbreviations

    translation usage and notes AB Artium Baccalaureus "Bachelor of Arts" An undergraduate bachelor's degree awarded for either a course or a program in the liberal arts or the sciences, or both. a.C.n. ante Christum natum "before Christ" "B.C." is commonly used in English instead to convey this meaning. ad. nat. delt. ad naturam delineavit "after ...

  6. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Office of Price Administration - Wikipedia

    en.wikipedia.org/wiki/Office_of_Price_Administration

    The OPA is featured, in fictionalized form as the Bureau of Price Regulation, in Rex Stout's Nero Wolfe mystery novel The Silent Speaker. The OPA unsuccessfully tried to revoke the car dealer license of unorthodox businessman Madman Muntz for violating used car regulations, subject to price control. Muntz was acquitted in Los Angeles Superior ...

  8. Opa (song) - Wikipedia

    en.wikipedia.org/wiki/Opa_(Giorgos_Alkaios_song)

    It was the highest placing non-English song of the contest. "Opa" was the most popular song for the jury in the United Kingdom, being awarded the full 12 points. Following Eurovision, "Opa" was formally adopted by Bournemouth University in the UK as their fieldwork anthem on the excavation programme throughout June and July 2010.

  9. Optical parametric amplifier - Wikipedia

    en.wikipedia.org/wiki/Optical_parametric_amplifier

    In an OPA, the input is two light beams, of frequency ω p and ω s. The OPA will make the pump beam (ω p) weaker, and amplify the signal beam (ω s), and also create a new, so-called idler beam at the frequency ω i with ω p =ω s +ω i. In the OPA, the pump and idler photons usually travel collinearly through a nonlinear optical crystal.