An Etymological Dictionary of Astronomy and Astrophysics

To substract the → bias from a flat-field or science frame obtained using an electronic detector.

Etymology (EN): Debias, from → de- + → bias.

Etymology (PE): Varak zodudan, from varak→ bias + zodudan “to polish, clean,” Mid.Pers. uzdātan, Av. uzdā-, from uz-, → ex-, + dā- “make, create.”