cupful

From Middle English copful, copfull, cupfulle, cuppefulle, equivalent to cup +‎ -ful. Cognate with Saterland Frisian Kopful (“cupful”), West Frisian kopfol (“cupful”).

cupful (plural cupfuls or cupsful)

1. The amount necessary to fill a cup.

   Add a cupful of milk to the sauce.

   • 1886 October – 1887 January, H[enry] Rider Haggard, She: A History of Adventure, London: Longmans, Green, and Co., published 1887, →OCLC:

     But as things were it was manageable enough, and we did not ship a cupful of water.

2. A half pint, i.e. eight ounces

• breakfastcupful
• coffeecupful
• eggcupful
• teacupful

• Webster's Seventh New Collegiate Dictionary, Springfield, Massachusetts, G.&C. Merriam Co., 1967