little finger

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The smallest finger of the human hand; the last finger as counted from the thumb.
• noun The part of a glove that covers this finger.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun the outermost and smallest finger of the hand, next to the ring finger, farthest from the thumb

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the finger farthest from the thumb