Meridian (Chinese medicine)
The meridian system (simplified Chinese: 经络; traditional Chinese: 經絡; pinyin: jīngluò; lit. 'meridian and collaterals'), also called channel network, is a pseudoscientific concept from traditional Chinese medicine (TCM) that alleges meridians are paths through which the life-energy known as "qi" (ch'i) flows.
Source: Wikipedia — Meridian (Chinese medicine) (CC BY-SA 4.0)