Definition of "ergocalciferol" [ergocalciferol]

• See vitamin D2. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Also has to be D3 (cholecalciferol, not D2 ergocalciferol) and oil based (softgels, not tablets)."
• "Drisdol is a prescription of 50,000 IU tablets of vitamin D2 or ergocalciferol."
• "He also recommends taking vitamin D3 (cholecalciferol), not vitamin D2 (ergocalciferol), its synthetic analog."