also tri-centennial, "comprising three hundred years; including or relating to an interval of three hundred years," 1818; as a noun, "day observed as a festival in commemoration of something that happened three hundred years before," 1872. See tri- + centennial.
tribunal
tribune
tributary
tribute
trice
tricentennial
triceps
triceratops
trichinosis
trichomoniasis
trichotillomania
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