Aph·e·to·hy·oi·dea \¦afəˌtōˌhīˈȯidēə\

Definition of Aphetohyoidea

  1. taxonomic synonym of placodermi

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Origin and Etymology of aphetohyoidea

New Latin, from Greek aphetos let loose, free + New Latin -hyoidea (from Greek hyoeidēs shaped like an upsilon, from hy, y upsilon + -oeidēs -oid

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to cast off or become cast off

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