tierce

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about tierce at Wordnik → Where our words come from →

1. The third canonical hour; about 9 a.m.
2. The cardinal number that is the sum of one and one and one.
3. One of three equal parts of a divisible whole.

   it contains approximately a third of the minimum daily requirement