cyanogen absorption

cyanogen absorption

[sī′an·ə·jən əb′sȯrp·shən]
(astrophysics)
Bands in the absorption spectra of stars at wavelengths near 418 nanometers, caused by atmospheric cyanogen; used as a measure of absolute stellar magnitude.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.