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Definition of Machaeridian
1. Noun. A fossil form of segmented (annelid) worm, of the class ''Machaeridia'', that had a scaly armour of mineralised plates ¹
¹ Source: wiktionary.com
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1. Noun. A fossil form of segmented (annelid) worm, of the class ''Machaeridia'', that had a scaly armour of mineralised plates ¹
¹ Source: wiktionary.com