noun
frontal bone
Anatomical term for the bone forming the forehead and part of the eye sockets.
前頭骨は頭蓋骨の一部です。
The frontal bone is part of the skull.
頭蓋骨 refers to the skull as a whole, while 前頭骨 specifically denotes the frontal bone.
Compound of 前頭 (forehead, front of the head) and 骨 (bone). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese anatomical naming conventions.