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  2. Meaning [1] Latin (or Neo-Latin) origin [1] a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night Omne Nocte a.s., as, AS left ear auris sinistra a.u., au, AU both ears together or each ear aures unitas or auris uterque b.d.s, bds, BDS 2 times a day bis die sumendum b.i.d., bid, BID

  3. Ethynyl group - Wikipedia

    en.wikipedia.org/wiki/Ethynyl_group

    In organic chemistry, an ethynyl group is a functional group with the formula −C≡CH. It is the acetylene molecule with one fewer hydrogen atom.. Ethynyl group (HC≡C–), also designated as acetylenic group (from acetylene), and referred to in IUPAC chemical nomenclature as -yne suffix.

  4. Dimethyl-4-phenylenediamine - Wikipedia

    en.wikipedia.org/wiki/Dimethyl-4-phenylenediamine

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

  5. Glossary of physics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_physics

    The term angular frequency vector is sometimes used as a synonym for the vector quantity angular velocity. [13] One revolution is equal to 2π radians, hence [13] [14] = =, where: ω is the angular frequency or angular speed (measured in radians per second),

  6. Synonym - Wikipedia

    en.wikipedia.org/wiki/Synonym

    Synonym list in cuneiform on a clay tablet, Neo-Assyrian period [1] A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. [2] For example, in the English language, the words begin, start, commence, and initiate are all synonyms of one another: they are ...

  7. Diethylaniline - Wikipedia

    en.wikipedia.org/wiki/Diethylaniline

    Diethylaniline is the organic compound with the molecular formula (C 2 H 5) 2 NC 6 H 5. It is a colorless liquid but commercial samples are often yellow. It is a precursor to several dyes and other commercial products.

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  9. List of typographical symbols and punctuation marks - Wikipedia

    en.wikipedia.org/wiki/List_of_typographical...

    The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it; The fourth (if present) links to the related article(s) or adds a clarification note.