D

(noun) a fat-soluble vitamin that prevents rickets. Synonyms: vitamin D, calciferol, viosterol, ergocalciferol, cholecalciferol.

(noun) the cardinal number that is the product of one hundred and five. Synonyms: five hundred, 500.

(noun) the 4th letter of the Roman alphabet. Synonyms: d.

(adj) denoting a quantity consisting of 500 items or units. Synonyms: five hundred, 500, d.