Teething refers to the process of new teeth rising or erupting through the gums. Teething can begin in infants as young as 2 months of age, even though the first tooth usually does not appear until about 6 months of age. Some dentists have noted a family pattern of early, average, or late teethers.
noble metal. 1. any of a number of metals, as gold, silver, mercury, or platinum, that resist oxidation when heated in air, and solution by inorganic acids. But now, at the first and yet final trial, she is proved and found to be of noble metal. There was a noble metal collarâabout thirty-two, the size would have been, on the usual scale.
1 They are precious metals and are also used as currency (a store of value) because of their intrinsic value. 2  They are found worldwide, but not in large enough quantities to render them less valuable.  Noble Metals have properties that lend themselves to jewelry making, including malleability and corrosion resistance.