noun, Astronomy. 1. a shift toward longer wavelengths of the spectral lines emitted by a celestial object that is caused by the object moving away from the earth. noun 1. a shift in the lines of the spectrum of an astronomical object towards a longer wavelength (the red end of an optical spectrum), relative to […]
adjective 1. (of radiation) having undergone a redshift.
noun 1. a high-school or college athlete kept out of varsity competition for one year to develop skills and extend eligibility. verb (used with object) 2. to withdraw (an athlete) from varsity competition. redshirt
adjective, Metallurgy. 1. brittle when at red heat, as iron or steel containing too much sulfur.