Relating to or characterized by improvisation, extemporaneous composition, or spontaneous creation without preparation.
From autoschedios (Greek: extemporaneous) + -astic (relating to). Scholarly adjective form preserving ancient Greek rhetorical terminology.
When a poet writes a poem on the spot without planning it, that's autoschediastic poetry—it's an old-school word for 'winging it' that scholars still use!
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