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noun
A fossil form of segmented (annelid) worm, of the class Machaeridia, that had a scaly armour of mineralised plates
Definition source: English Wiktionary via Wiktextract
Topics: biology, history, human-sciences, natural-sciences, paleontology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Machaeridia + -ian
