An Etymological Dictionary of Astronomy and Astrophysics

A lamp used for instrument calibration, such as an internal He-Ar arc for wavelength calibration or an external source of light placed in the telescope dome for flat-field exposures.

Etymology (EN): → calibration; lamp, from O.Fr. lampe, L. lampas, from Gk. lampas “torch, lamp, light, meteor,” from lampein “to shine.”

Etymology (PE): Kabizeš, → calibration; lâmp, from Fr., as above.