1915, with -iasis + trichomonas, genus of a family of flagellate parasites, from tricho-, Latinized form of Greek trikho-, combining form of thrix (genitive trikhos) "hair" + -monas.
trice
tricentennial
triceps
triceratops
trichinosis
trichomoniasis
trichotillomania
trick
trickery
trickle
trickster
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