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rachis

DEFINITIONS OF: rachis

1

n axis of a compound leaf or compound inflorescence

Type of:
axis
the main stem or central part about which plant organs or plant parts such as branches are arranged

n the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

Synonyms:
back, backbone, spinal column, spine, vertebral column
Types:
notochord
a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates
chine
backbone of an animal
urochord
a notochord of a larval tunicate typically confined to the caudal region
Type of:
skeletal structure
any structure created by the skeleton of an organism
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