In a paragraph, I know I can refer to text by phrases like 'as said earlier', 'as mentioned above', etc. However I am wondering what would be the right word if I want to say 'This is not the first time this word is used in this text. The first use is in a _ line.' What are the right words? Above/below? Earlier/later?
Infra (below) and supra (above) are also frequently used. You can just put them between brackets after the word you used before.
Other possibilities: aforementioned, above(-)mentioned, previously mentioned, as stated before... Above and earlier are also correct.
Above and earlier are fine choices, as is "first use is in a previous line". Mix and match to suite your taste, though "above" should avoided if something is to be in a book/booklet/pamphlet form as "above" might not end up being applicable after final typesetting.