one of two or more different words in a language derived from the same origin but coming by different routes (e.g., toucher and toquer in French or blanche and blank in English)
A doublet (also dublette) is a gem made from two layers in order to save expenses; the lower part of the composite stone is glass or a non-precious stone, the top is the more valuable stone Many different types of doublets have been manufactured (including opal doublets) One common doublet contains a layer of real garnet and a layer of glass A thin, red garnet top is glued to a colored glass bottom A green glass bottom with a red garnet top layer produces an emerald-like stone A diamond is enlarged by cementing it to a crystal base
A form of gemstone trickery that was devised to allow inexpensive materials to imitate the more valuable gemstones before modern synthetics were available A doublet can take several forms but always involves a fake gemstone produced by gluing together two different materials to form an illusion A very common one in Victorian times was the garnet and glass doublet This involved a red garnet top, glued to a colored glass bottom The refractive properties of a faceted stone are such that the red of the garnet only shows at odd angles, or if the stone is immersed in a special liquid with a high refractive index Thus, for example, a green glass bottom with a garnet top will give the appearance of a fine emerald because the top is a natural gemstone with cut facets, and a few natural imperfections, and the bottom is bright green which reflects throughout the stone The effect is hard to appreciate unless you've seen one
A doublet was a short, tight jacket that was worn by men in the fifteenth, sixteenth, and early seventeenth centuries. a man's tight jacket, worn in Europe from about 1400 to the middle 1600s
An arrangement of two lenses for a microscope, designed to correct spherical aberration and chromatic dispersion, thus rendering the image of an object more clear and distinct
The electronic state of a molecule having one unpaired spin is termed a doublet (see °radical) This term is derived from spectroscopy: an unpaired spin can be either up or down with respect to a magnetic field, and these states have different energy, resulting in field-dependent pairs, or doublets, of spectral lines (See °triplet, °singlet )
{i} fitted jacket worn Europe during the 14th century; (Linguistics) one of two or more similar words in a language that are from the same root but have different meanings (usually one word is an intellectual one and the other is popular)
One of two or more words in the same language derived by different courses from the same original from; as, crypt and grot are doublets; also, guard and ward; yard and garden; abridge and abbreviate, etc
If a bell is not round, individual partials can split into a close pair of frequencies which beat together Doublets can add antique charm to a bell's sound but are usually to be avoided