I was interested in learning about this "myriad" debate, as I have used the word throughout my life as a noun, but have seen it in lyrics and poetry used mainly as an adjective. Since indeed, the original (archaic) use of the word meant literally the number 10,000 -- would it then be acceptable to use it in its noun form without placing it between the words "a" and "of"? For example, you ask me, "How many dollars did you win in that contest?" and I could simply reply, "Myriad." I am asking because I am not an English or a Greek language scholar, but I am curious to know. Of course, I am aware that this is the "archaic" definition, and therefore it is all but completely dead in today's lexicon, and I would never actually use it in this context... but would it still technically be correct?