As a noun raphidian
is (zoology) any member of the raphidia.
As an adjective rachidian is
(anatomy|zoology) of or relating to the rachis; spinal; vertebral.
rachidian
English
Alternative forms
* rhachidian
Adjective
(
-)
(anatomy, zoology) Of or relating to the rachis; spinal; vertebral.
(
Webster 1913)