[tee-spoon-foo l]
noun, plural tea·spoon·fuls.
  1. the amount a teaspoon can hold.
  2. a volumetric measure equal to 1/6 fluid ounce (4.9 ml); 1/3 tablespoonful. Abbreviation: t., tsp.

Origin of teaspoonful

First recorded in 1725–35; teaspoon + -ful
Related formshalf-tea·spoon·ful, adjective, noun

Usage note

See -ful.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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