A podcast
"podcasting" combines "broadcasting"
with "iPod."
(or non-streamed webcast) is a series of digital media files
audio or video
that are released episodically and often downloaded through web syndication. The word replaced webcast in common use with the success of the iPod and its role in the rising popularity and innovation of web feeds.
The mode of delivery differentiates podcasting from other means of accessing media files over the Internet, such as direct download, or streamed webcasting.
Podcasts refer to the posting of digital audio content onto a web site;
these files are downloadable to an MP3 player.