a series of lines in the spectrum of light emitted by excited atoms of an element, each line being related to the others in the series by a simple numerical equation and identified with a particular energy level of an atom of the element.
noun, Astronomy. 1. a category for classifying a star, as A star or G star, according to features of its spectrum, as its shape as a function of temperature and wavelength and its absorption spectrum, that indicate the surface temperature of the star and the presence of particular atoms or molecules in its outer layers: […]
noun 1. a vivid yellow color.
noun, Chiefly British. 1. specter. noun 1. a visible incorporeal spirit, especially one of a terrifying nature; ghost; phantom; apparition. 2. some object or source of terror or dread: the specter of disease or famine. noun 1. a ghost; phantom; apparition 2. a mental image of something unpleasant or menacing: the spectre of redundancy
noun, Biochemistry. 1. a rodlike structural protein of the red blood cell membrane. noun 1. any one of a class of fibrous proteins found in the membranes of red blood cells, the brain, the intestine, etc spectrin spec·trin (spěk’trĭn) n. A contractile protein of high molecular weight that is a component of a network in […]