In a manner relating to or using electricity; done by means of electric power or energy.
From electric (from Greek 'elektron' meaning amber, which creates static charges when rubbed) + -ally (suffix making it an adverb). The root refers to ancient observations of amber's properties.
The word 'electric' comes from amber because ancient Greeks discovered that rubbing amber with fur caused it to attract light objects—they didn't know it was static electricity!
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