ari·bo·fla·vin·o·sis \|āˌrībəˌflāvə̇ˈnōsə̇s also -rib- or -lav-\noun (pluralariboflavino·ses \-ōˌsēz\) Etymology: New Latin, from a- (II)+ International Scientific Vocabulary riboflavin + New Latin -osis 1.: a deficiency disease due to inadequate intake of riboflavin that is marked by cheilosis, scaling around the nose, and sensitivity to light 2.: curled-toe paralysis