1. rachis

noun. axis of a compound leaf or compound inflorescence.


  • forward

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2. rachis

noun. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord.


  • axial skeleton
  • intervertebral disk
  • vertebral canal
  • spinal canal
  • chine
  • notochord
  • canalis vertebralis
  • backbone
  • intervertebral disc
  • vertebra
  • spinal column
  • skeletal structure
  • coccyx
  • tail bone
  • vertebral column
  • back


  • front
  • fore
  • anterior
  • negate

Sentences with rachis

1. Noun, singular or mass
Shagbark hickory has a rachis as long as 14 inches and typically has five leaflets on one leaf.

2. Adjective
This disease is also known as "rachis blight."

3. Verb, base form
Petiole and rachis blights weaken Pygmy Date Palms, but will not kill the tree.