noun
branch; offshoot; tributary; fork; ramification
Used for physical branching structures such as rivers, nerves, blood vessels, ore veins, or roads. Not used for abstract branching like organizational divisions.
この川の分脈はいくつもの小さな流れに分かれている。
The tributaries of this river split into many small streams.
神経の分脈が体中に広がっている。
The ramifications of the nerves spread throughout the body.
Composed of 分 (ぶん, 'divide, branch') and 脈 (みゃく, 'vein, pulse'). The combination literally means 'branching vein' and is used for physical branching structures.