Zen is a discipline.
The actual Chinese term for the "Zen school" is  (pinyin: Chnzng), while "Chan" just refers to the practice of meditation itself (Chinese: ; pinyin: xchn) or the study of meditation (Chinese: ; pinyin: chnxu) though it is often used as an abbreviated form of Chnzong
==== Japanese Zen ====Zen was not introduced as a separate school until the 12th century, when Myan Eisai traveled to China and returned to establish a Linji lineage, which eventually perished

