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deutencephalon
deutencephalon n. 
/ˌdʒuːtɛnˈsɛfəlɒn/, /ˌdjuːtɛnˈkɛfəlɒn/, /ˌdʒuːtɛnˈkɛfəlɒn/,
Brit. /ˌdjuːtɛnˈsɛfəlɒn/
, /ˌdjuːtɛnˈsɛfəlɒn//ˌdʒuːtɛnˈsɛfəlɒn//ˌdjuːtɛnˈkɛfəlɒn//ˌdʒuːtɛnˈkɛfəlɒn/U.S. /ˌd(j)utnˈsɛfəl(ə)n/
the second of the three primary cerebral vesicles of the embryo./ˌd(j)utnˈsɛfəl(ə)n/ΚΠ
1881 St. G. Mivart Cat 358 The fore-brain, called also the deutencephalon.
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