Definition of rachidian in English:

rachidian

(also rhachidian)

Pronunciation /rəˈkɪdɪən/

adjective

  • 1Anatomy
    Of or relating to the spine; spinal; vertebral.

  • 2Zoology
    In a gastropod mollusc: designating or relating to any of the median row of teeth of the radula.

noun

Zoology
  • A rachidian tooth of a gastropod mollusc.

Origin

Early 19th century; earliest use found in The Lancet. From French rachidien from scientific Latin rachid- (taken as stem of rachis) + French -ien.