as much as a teacup will hold, equal to 4 fluid ounces (113 grams).
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How to use teacupful in a sentence
As the printed directions gave no information on the matter, Alfred thought a teacupful of the pellets would be about right.Watch Yourself Go By | Al. G. Field
Then put with this two eggs, whipped very light and a teacupful of cream or milk, salting to taste.My Pet Recipes, Tried and True | Various
The Seabird goes over it like one of her namesakes; she is not taking a teacupful now over her bows.Among Malay Pirates | G. A. Henty
Let the top be strewn with sugar and bits of butter and pour over it a teacupful of water.Vaughan's Vegetable Cook Book (4th edition) | Anonymous
Use a teacupful of sugar and half a pound of butter to a half gallon pan of potato.Vaughan's Vegetable Cook Book (4th edition) | Anonymous