The history told me nothing why an involuntary, extremely painful spasm, is named after a horse called Charley. Charley in the UK is often spelled Charlie, a diminutive of Charles, and it's also used to call a foolish or silly person. Who was Charley; was it the name of a horse?
etymology - Why is muscle cramp called a “charley horse”? - English ...
4 While I was reading about why the 'nosebleed' seats are called such a preposterous name at the ballpark, my curiosity was piqued in reference to another ballpark term that has troubled me over the years. The bench-like cheap seats have always been referred to as "bleachers".
etymology - Why are the bleachers called the bleachers? - English ...
These are the signs: * What is it called in general, and what it is called when used in math, to multiply numbers? * is called an asterisk; although sometimes people will use the generic term "star." When it is used in mathematical equations, people say "times." Example 12*2=24 would be read out loud as: Twelve times two equals twenty-four.
In the case of 9th, the superscript shown is indeed called the 'ordinal indicator' as Matt Gutting has noted in his answer. The addition of -th/ -eth relates to numbers 4 to 20 (and similarly,) and is a suffix to the cardinal number.