Definition of "fatless"

fatless

/ˈfætləs/

adjective
not comparable
1. Without fat, especially in the senses: made without fat, fat-free.
  Quotations
  Soon oranges were seedless,The putting green was weedless,The college boy hatless,The proper diet, fatless, […]
  1936, Arthur Guiterman, First Dentistry was Painless