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Definisi 'opisthobranchia'
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English to English noun
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gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares |  | source: wordnet30
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A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs. | | source: webster1913
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