From Wikipedia, the free encyclopedia. Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis.o a decreasing extent, acetic anhydride is also prepared by the reaction of ketene (ethenone) with acetic acid at 45â55 Â°C and low pressure (0.05â0.2 bar).
Definition: The prefix (eu-) means good, well, pleasant or true. It is derived from the Greek eu meaning well and eus meaning good. Eubacteria (eu-bacteria) - kingdom in the bacteria domain. Bacteria are considered to be true bacteria, distinguishing them from archaebacteria.
Definition of Eulogy Known as homily, the term eulogy originates from the Greek word eulogia, which means âto praiseâ somebody or something. A eulogy is a literary device that is a laudatory expression in a speech, or a written tribute to a person recently deceased. We can say, it is a commendation or high praise intended to give honor, generally to a dead family member or loved one, or it is a tribute given to a dead person at his or her funeral.