Th Th /ˈtiːˈeɪtʃ/

noun

1. A soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands  ( atomic number 90 , Th , thorium )
   a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
   
   
2. The fifth day of the week; the fourth working day  ( Th , Thursday )
   the fifth day of the week; the fourth working day
    Thursday is often referred to as "Friday Eve" because it precedes the weekend
   Thursday is often referred to as "Friday Eve" because it precedes the weekend