1. (adj)five hundred, 500, D the cardinal number that is the product of one hundred and five Synonyms: ergocalciferol, cholecalciferol, calciferol, five hundred, vitamin D, euchre, viosterol Antonyms: ordinal
2. (adj)five hundred, 500, d denoting a quantity consisting of 500 items or units Synonyms: d, five hundred Antonyms: ordinal