tribologist

tri·bol·o·gy

[trahy-bol-uh-jee, tri-]
noun
the study of the effects of friction on moving machine parts and of methods, as lubrication, of obviating them.

Origin:
1965–70; tribo- + -logy

tri·bol·o·gist, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
tribology (traɪˈbɒlədʒɪ) [Click for IPA pronunciation guide]
 
n
the study of friction, lubrication, and wear between moving surfaces

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Tribologist is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Etymonline
Word Origin & History

tribology
1965, "study of friction," from Gk. tribos "rubbing," from tribein "to rub" (from PIE base *ter- "to rub, turn, twist;" see throw) + -logy.
Online Etymology Dictionary, © 2010 Douglas Harper
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