(trademark) a pocket-sized device used to play music files
"She plugged her ipod into her headphones to listen to her favorite playlist on the subway."
A portable music player made by Apple.
"The student was marked down on her spelling test because she wrote ipod instead of iPod."
Misspelling of iPod.
In plain English: An iPod is an old-school portable music player that lets you listen to songs from your computer on a small screen with buttons instead of touch controls.
"She put her favorite song on and danced with her iPod in her hand."
Apple coined the term iPod by combining the prefix "i-" with "pod," which suggests a small container for holding items. The name was inspired by space shuttles from 2001: A Space Odyssey and the famous line about opening pod bay doors.