inion

名词 inion:

1. the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)

in.i.on

n.（名词）
The most prominent projecting point of the occipital bone at the base of the skull.
枕外隆凸点：头盖骨上最突出的骨点

来源：
Greek [occipital bone]
希腊语 [圆骨头]
from is in- [sinew, fiber] * see wei-
源自 is in- [肌腱，纤维] *参见 wei-