spine vs rachis

rachis vs spine

spine and rachis both are nouns.

Word	Noun	Adjective	Verb	Adverb
spine	Yes	No	No	No
rachis	Yes	No	No	No

As nouns, spine and rachis are synonyms defined as:

spine and rachis: the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

Other synonyms of spine include back, backbone, spinal column, vertebral column.

spine (noun)	rachis (noun)
a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin	the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved	axis of a compound leaf or compound inflorescence
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
a small sharp-pointed tip resembling a spike on a stem or leaf
any sharply pointed projection

Difference between spine and rachis

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