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/ˈɹeɪkɪs/ · noun
(obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine..
In some squid species, the pen rachis flares out into wings on either side, and the tip of the rachis grows into a thick cone.
Use rachis when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Rachis means (obsolete, zoology, anatomy) The spinal column, or the vertebrae of the spine..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
In some squid species, the pen rachis flares out into wings on either side, and the tip of the rachis grows into a thick cone.
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