Definify.com
Webster 1913 Edition
Wineglassful
Wine′glassˊful
;,n. pl. 
Wineglassfuls
. As much as a wineglass will hold; enough to fill a wineglass. It is usually reckoned at two fluid ounces, or four tablespoonfuls. 
Definition 2025
wineglassful
wineglassful
English
Noun
wineglassful (plural wineglassfuls or wineglassesful)
- As much as a wineglass will hold.