Podcast

A podcast is a modern take on the idea of radio broadcasts, but with a more diverse subject range. Derived from the combination of "iPod" and "broadcast", there is a different (sometimes multiple) cast for almost every subject imaginable. Each cast is released as an episode of sorts, and is available to anyone with the ability to listen to music data.

Source: http://www.howtopodcasttutorial.com/what-is-a-podcast.htm