Definition: The fingernail on the thumb.
Alright class, settle down now, let’s take a look! You’ve stumbled upon a tricky word today, it’s true, “Thumbnails” – let’s break it down for me and you. The dictionary's right, it starts with a plea, "The fingernail on the thumb," for all to see! But “thumbnails” has another meaning, don’t you fret, Especially when we talk about pictures, you bet! It means small images, quick and neat, Like previews online, oh so sweet! Think of photos tiny, little squares displayed, Showing a glimpse before you've bravely made A click to enlarge – it’s quite the treat, So "thumbnails" show you what you'll meet! Does that make sense? Any questions for me?