Artificial intelligent assistant

rhabdal

rhabdal, a. Zool.
  (ˈræbdəl)
  [f. rhabdus + -al1.]
  Pertaining to a rhabdus.

1888 Sollas in Challenger Rep., Zool. XXV. 345 Disc..sometimes notched by a rhabdal sinus.

Oxford English Dictionary

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