An alternative or variant plural form referring to organisms without a coelom; an older taxonomic designation.
From Greek roots 'a-' (without) and 'koiloma' (cavity), with '-i' as a Latin plural ending. This represents variant terminology from historical zoological classifications that have largely been superseded by modern taxonomy.
Scientific terminology evolves constantly—'acoelomi' is an older plural form you'd see in 19th-century German or Latin zoology texts, showing how scientists experimented with different ways to name these creatures!
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