Obsolete term; modern Japanese uses テレビアニメ or simply アニメ. This word was used in the early days of television animation.
In the Showa era, the term 'テレビ漫画' was commonly used.
Compound of テレビ (terebi, 'television') and 漫画 (manga, 'comics/cartoons'), reflecting the early perception of TV animation as 'televised manga'.