IPA: /tɪərs/
KK: /tɪərs/
A unit of measurement for liquid capacity that is one-third of a pipe, equivalent to 42 gallons, or a term used in music to describe an interval of a third.
The barrel held a tierce of wine, which was enough for the celebration.
Tierce → It originates from Old French *tierce*, meaning a third part or a third. The word refers to something that is one of three equal parts.
Think of 'a third part' — that's what tierce means, representing one of three equal sections.