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protocephalon [ˌprəutəu'sefələ] сущ. ударения
палеонт.	протоцефалон
Gruzovik, энт.	протоцефалон (1 the part of an insect embryo that consists of the prostomium and the first postoral somite; 2 the primitive arthropod head corresponding to the sensory as distinguished from the feeding portion of the head of higher forms)