| ceratodus | (noun) extinct lungfish | - |
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| exodus | (noun) a journey by a large group to escape from a hostile environment | Synonyms: hegira, hejira |
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| fundus | (noun) (anatomy) the base of a hollow organ or that part of the organ farthest from its opening | - |
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| nidus | (noun) a nest in which spiders or insects deposit their eggs | - |
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| (noun) a central point or locus of an infection in an organism | Synonyms: focal point, focus |
| solidus | (noun) a punctuation mark (/) used to separate related items of information | Synonyms: diagonal, separatrix, slash, stroke, virgule |
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| (noun) a gold coin of the Byzantine Empire; widely circulated in Europe in the Middle Ages | Synonyms: bezant, bezzant, byzant |