Rachis
/ˈɹeɪkɪs/
"Rachis" in a Sentence (1 examples)
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.
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.