n. unit of dose of ionising radiation, e.g. X-rays or gamma rays. röntgen rays, n. pl. X-rays. röntgenogram, röntgenograph, n. X- ray photograph. röntgenology, n. radiology. röntgenoscopyn. X-ray examination.
A condor, poised to attack enemies, protects the nation under its wings. Blue symbolizes independence from Spain. Yellow recalls the Federation of Greater Colombia. Red stands for courage. Effective date: 7 November 1900.