We're working on a new site. Click here to get a sneak preview.
Medical Dictionary


noun phthi·o·col \ˈthī-ə-ˌkl, -ˌkōl\

Medical Definition of PHTHIOCOL

:  a yellow crystalline quinone C11H8O3 with vitamin K activity that is isolated from the human tubercle bacillus and also made synthetically


How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears