| Answer | Crossword Clue |
|---|---|
| calami | the hollow base of a feather; a quill |
| calamus | The hollow lower part of the shaft of a feather, which lacks barbs; a quill |
| umbilicus | A hole at each end of the hollow shaft of a feather |
| umbilici | A hole at each end of the hollow shaft of a feather |
| umbilicuses | A hole at each end of the hollow shaft of a feather |
| aftershaft | the second shaft coming out of the quill of a feather |
| aftershafts | AFTERSHAFT, the second shaft coming out of the quill of a feather |
