From Longman Dictionary of Contemporary Englishindex fingerˈindex ˌfinger noun [countable] HBHthe finger next to your thumb SYN forefinger
Examples from the Corpus
index finger• Now, gently stretch-pull each of your toes between your thumb and index finger.• The point of the heel crushed the tip of his index finger, splitting the nail as far as the cuticle.• A young man sat slumped there, his index finger hooked down into his water glass, stirring the ice cubes around.• Indeed, he kept them closed as he opened the Gospels, and planted his long index finger blindly upon the page.• My index finger started developing an involuntary twitch towards the fast forward button.• This time the thumb was in the mouth while the index finger was placed between the gums and the upper lip.• Roll your index finger evenly from left to right on the ink-pad, then again on the paper. 