vi·os·ter·ol 
(vī-ŏstə-rôl′, -rōl′)
(vī-ŏstə-rôl′, -rōl′)n.
A preparation of vitamin D2 obtained from ultraviolet irradiation of ergosterol, formerly used medicinally.
[(ULTRA)VIO(LET) + (ERGO)STEROL.]
- cut off one's nose to spite one's face
- cut (one's) losses
- cut one's losses
- cut (one's) teeth on
- cut one's teeth on
- cut out
- cutout
- cutover
- cutpurse
- cut-rate
- cut short
- cut (someone) down to size
- cut someone down to size
- cut someone some slack
- cut some slack
- cuttable
- Cuttack
- cut teeth on
- cutter
- cut the cheese
- cut the mustard
- cutthroat
- cutthroat trout
- cut time
- cutting