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index finger

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noun
  1. forefinger.

Origin of index finger

First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for index finger

index finger

noun
  1. the finger next to the thumbAlso called: forefinger
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

index finger in Medicine

extensor muscle of index finger

n.
  1. A muscle with its origin from the ulna, with insertion to an aponeurosis of the index finger, with nerve supply from the radial nerve, and whose action assists in extending the forefinger.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.