1) Plastic surgery 
Pollicization (or pollicisation) is a hand surgery technique in which a thumb is created from an existing finger. Typically this consists of surgically migrating the index finger to the position of the thumb in patients who are either born without a functional thumb (most common) or in patients who have lost their thumb traumatically and are not a...
Construction of a substitute thumb. ... Origin: L. Pollex, thumb, + -ise, to make like, + -ation, state ... (05 Mar 2000) ... 
Type: Term Pronunciation: pol′i-si-zā′shŭn Definitions: 1. Construction of a substitute thumb.