a mixture of lumisterol and calciferol, obtained by ultraviolet irradiation of ergosterol.
BEAT THE DOLDRUMS WITH THIS WORD OF THE DAY QUIZ!
We know you’ll tackle this quiz totis viribus! See how many words from the week of Oct 12–18, 2020 you get right!
Question 1 of 7
What does “Indigenous” mean?
Words nearby vitamin D1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for vitamin D1
the first isolated form of vitamin D, consisting of calciferol and its precursor, lumisterol
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012