index

[1]	guide , directory , list , listing , table of contents , catalogue , key , thesaurus
[2]	mark , index number , indicant , sign , clue , indicator , token , hint , pointer , indicator , indication , guide
[3]	index finger , exponent , power , forefinger , first finger , pointer , marker , needle , (Mainly Brit) typography hand , (Mainly US) typography fist
[4]	ratio , measure , formula , factor
[5]	index finger , forefinger