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Electroless nickel immersion gold (ENIG or ENi/IAu), also known as immersion gold (Au), chemical Ni/Au or soft gold, is a metal plating process used in the manufacture of printed circuit boards (PCBs), to avoid oxidation and improve the solderability of copper contacts and plated through-holes.
Aurum, the Latin word for gold and the source of its chemical symbol, "Au" Aurum bikes, a Spanish bicycle manufacturer; Aurum (liqueur), an Italian liqueur; Aurum Geyser, in the Upper Geyser Basin of Yellowstone; Aurum, Nevada, a ghost town; Aurum Press, a defunct English publishing house, now part of The Quarto Group; Aurum, an album by ...
Group 11, by modern IUPAC numbering, [1] is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), gold (Au), and roentgenium (Rg), although no chemical experiments have yet been carried out to confirm that roentgenium behaves like the heavier homologue to gold.
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
Words with specific British English meanings that have different meanings in American and/or additional meanings common to both languages (e.g. pants, cot) are to be found at List of words having different meanings in American and British English. When such words are herein used or referenced, they are marked with the flag [DM] (different meaning).
The golden mean concept is common to many philosophers, chiefly Aristotle. auri sacra fames: accursed hunger for gold: From Virgil, Aeneid, Book 3, 57. Later quoted by Seneca as quod non mortalia pectora coges, auri sacra fames ("what do not you force mortal hearts [to do], accursed hunger for gold"). auribus teneo lupum: I hold a wolf by the ears
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Gold, chemical symbol Au; Absorbance unit, a reporting unit in spectroscopy; Atomic units, a system of units convenient for atomic physics and other fields; Ångström unit, a unit of length equal to 10 −10 m or 0.1 nanometre.