Does "My A's' stems" sound natural? I actually have two questions. Is it correct to use two apostrophes in the word A's'? As far as I know, the proper way to write the plural form of a single letter is adding 's and the second apostrophe is there in order to form the possessive, which is in this case only an apostrophe without adding -s because the noun is plural, right? However, it seems to be odd. I know I could also say "the stems of my A's" but I'm curious whether it's correct to use two apostrophes in this case or not. My other question is, what do you call that part of the letter "A" that I'm talking about? I'm really not sure if it's its "stem" or not. It doesn't have an official name I suppose, but how would you refer to that part?