Top definition
The smallest unit of matter in the Universe. Makes up the three-dimensional field that is currently (incorrectly) termed "dark matter."

Plural: Quantoretta.
Each quantoretto contains enough energy to power all electrical devices on Earth for millions of years.
by William Dean A. Garner March 15, 2011
Get the mug
Get a Quantoretto mug for your mother-in-law Jovana.