Definition of thumbnail in English:

thumbnail

Line breaks: thumb|nail
Pronunciation: /ˈθʌmneɪl
 
/

noun

  • 1The nail of the thumb.
    More example sentences
    • The body might be the length approximately, or slightly more than the length of an adult thumbnail, the legs obviously make the spider a little bit bigger than that.
    • The point of entry can be marked with an impression from a thumbnail, a needle cap, or an indelible ink pen.
    • In the centre we find a brown seed the size of your thumbnail, elongated and glabrous as river stone.

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Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
noun
(in science fiction) navigation in outer space