| Word form | zugaikotsu |
| Original script | 頭蓋骨 |
| LWT meaning(s) | |
| Comments on word | zugaikotsu first attested in 1884. variants zugai (1774), tōkotsu (1884). The kan’on variant with tō is also seen in tōgai(kotsu) |
| Analyzability | analyzable compound |
| Gloss | zu-gai-kotsu head-?-bone |
| Age | Early Modern Japanese [21] (1604–1867) |
| Lexical stratum | kango (go’on) |
| Year | 1774 |
| Register | General |
| Numeric frequency | 0 |