trigeminal nerve, tsutsugamushi, tu quo que, Tuesday, tungsten, turbidimeter, twelve, twenty

This will end the T's.  Several misnomers here...trigeminal, twelve and twenty, as well as etymologies form Sweden and Japan.

trigeminal nerve: [tri = three, gemini = twins, therefore  3 + 2 = 5] 

This is the 5th cranial nerve

tsutsugamushi:  a rickettsial infection  occurring in the Pacific area [Japanese tsutsuga sickness,  mushi insect]  

     I would often ask, tongue in cheek, pediatric residents that I taught to consider this in their differential diagnoses to make them think of esoteric causes of the symptoms.

tu quo que:  [Latin tu  you] meaning "you too"

Tuesday: [Middle English tiwsday; Old English twi god of war, dag day] 

     Another rather bellicose etymology, along with Wednesday, Thursday and Saturday.  I think I will stick with Sunday and Monday.  

tungsten: [Swedish tung heavy, sten stone] an element

    Again, the beauty of the Scandinavian etymologies.  

turbidimeter: measures turbidity

    Perhaps to be utilized in analyzing political discussions.  

twelve:  [a misnomer, from combining "two" and "eleven"]  

    (Also, twenty"= two and ten.)