Definition from Wiktionary, the free dictionary
micromineral (plural microminerals)
- A mineral of which only trace amounts are needed in the diet.
2007 January 21, Rob Walker, “Earth Cover”, New York Times:
- The company’s “patent-pending Rare Minerals Skin Revival Treatment” is actually meant to be worn while sleeping, making your skin “more luminous” all the while, thanks to a formula that includes “all 72 organic macro- and microminerals that exist in nature.”