| barbacan | (noun) a tower that is part of a defensive structure (such as a castle) | Synonyms: barbican |
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| coracan | (noun) East Indian cereal grass whose seed yield a somewhat bitter flour, a staple in the Orient | Synonyms: African millet, corakan, Eleusine coracana, finger millet, kurakkan, ragee, ragi |
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| heterostracan | (noun) extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian | - |
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| osteostracan | (noun) extinct jawless fish of the Devonian with armored head | Synonyms: cephalaspid |
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