noun
Anatomical term for the point where a structure such as an artery or nerve begins. The gloss 'starting point' is a literal translation of the kanji and is not a general-use meaning.
この動脈の起始点は大動脈弓です。
The origin of this artery is the aortic arch.
神経の起始点を確認する
A dissection was performed to identify the origin of the nerve.
停止点 is the opposite concept, meaning 'insertion point' or 'termination point' in anatomy.
Compound of 起始 (kishi, 'origin') + 点 (ten, 'point'). The exact historical derivation is uncertain; the spelling is conventionally associated with anatomical terminology.