teaspoon + -ful
teaspoonful (plural teaspoonfuls or teaspoonsful)
- A unit of capacity equal to the amount a teaspoon can hold which is taken approximately as 5ml.
1960, P. G. Wodehouse, Jeeves in the Offing, chapter XVII:
- “When I say mind,” said the blood relation, “I refer to the quarter-teaspoonful of brain which you might possibly find in her head if you sank an artesian well.”