Word origins

• wheel of fortuneA gambling or lottery device consisting of a wheel which is spun horizontally to determine, by its stopping position, whether a gambler will receive one of the prizes marked around its circumference.
• white leadTin, golden marcasite.
• white snowSynonym of zinc oxide, particularly white forms.
• wisdom toothOne of the four (one upper and one lower on each side) rearmost molars in humans, which typically develop between ages 18-24.
• with a grain of saltWith a little common sense and skepticism.
• wolf's headIn mediaeval times, an outlaw; one who may be slain without judicial enquiry.
• world soulA single, unifying spirit believed by some to animate every living being in the world and to underlie the value of every inanimate thing as well.
• yearthousandmillennium (a thousand-year timespan)