Artificial intelligent assistant

lambdal

ˈlambdal, a. Obs. rare—1.
  [f. lambda + -al1.]
  = lambdoidal.

1634 T. Johnson tr. Parey's Chirurg. x. viii. (1678) 234 If that part of one of the bones of the Bregma, which is next to the Lambdal suture [orig. suture lambdoide] be smitten.

Oxford English Dictionary

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