Plural of eolopile; multiple ancient steam-powered rotating devices, a variant spelling of eolipiles.
Direct plural of the alternate spelling 'eolopile' (from Greek 'aiolos' + 'pyle'). Appears in historical engineering and archaeology texts referring to multiple such devices.
Finding the alternate spelling 'eolopiles' in old texts reminds us that ancient engineering ideas weren't lost because people forgot them—they were lost because society shifted toward different values and goals!
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