Search Result for "thumbnail": 
Wordnet 3.0

NOUN (1)

1. the nail of the thumb; 



WordNet (r) 3.0 (2006):

thumbnail
    n 1: the nail of the thumb


The Free On-line Dictionary of Computing (30 December 2018):

thumbnail
thn

    (From "thumbnail sketch") A file
   format used by Graphics Workshop for Microsoft Windows.
   Filename extension: ".thn".

   [What's in the files?]

   (1996-05-28)