Artificial intelligent assistant

pectostracan

pectostracan, a. and n. Zool.
  (pɛkˈtɒstrəkən)
  [f. mod. Zool. L. Pectostraca (f. Gr. πηκτ-ός congealed + ὄστρακον tile, potsherd, shell) + -an.]
  a. adj. Belonging to the division Pectostraca of Crustacea in Huxley's classification, a synonym of Cirripedia. b. n. A crustacean belonging to this division, a cirriped. So pecˈtostracous a.

Oxford English Dictionary

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