| Answer | Crossword Clue |
|---|---|
| spiniform | like a thorn or spine |
| rachidial | of or like a rachis, the spine or axis of a feather also RACHIDIAN, RHACHIDIAL |
| rhachidial | of or like a rhachis, the spine or axis of a feather also RACHIDIAL, RACHIDIAN |
| rachidian | of or like a rachis, the spine or axis of a feather also RACHIDIAL, RHACHIDIAL |
| opisthotonic | of or like opisthotonos, extreme arching backwards of the spine and neck as a result of spasm of the muscles in that region |
| thornlike | like a thorn |
