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triangulate
triangulation
Triangulum
Triangulum Australe
triarchy
Triassic
triathlon
triatomic
triaxial
triazine
triazole
tribade
tribadism
tribal enrollment officer
tribalism
tribasic
tribe
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tribology

tri·bol·o·gy [ trī bólləjee, tri bólləjee ]


noun 
Definition:
 
study of interacting moving surfaces: the science and technology of interacting surfaces in relative motion, including the study of friction, lubrication, and wear


tri·bo·log·i·cal [ trbə lójjik'l, trìbbə lójjik'l ] adjective
tri·bol·o·gist [ trī bólləjist, tri bólləjist ] noun
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