thumbnail

1 thumbnail /ˈθʌmˌneɪl/ noun
plural thumbnails
1 thumbnail
/ˈθʌmˌneɪl/
noun
plural thumbnails
Britannica Dictionary definition of THUMBNAIL
[count]
1 
: the hard covering at the end of a thumb : the fingernail of a thumb — see picture at hand
2 
computers : a very small copy of a larger picture on a computer
2 thumbnail /ˈθʌmˌneɪl/ adjective
2 thumbnail
/ˈθʌmˌneɪl/
adjective
Britannica Dictionary definition of THUMBNAIL
: very short or brief