say it: teers
tierce is a noun meaning "the third canonical hour; about 9 a.m.". It carries 3 recorded senses.
the third canonical hour; about 9 a.m.
one of three equal parts of a divisible whole
“it contains approximately a third of the minimum daily requirement”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tierce come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.