An aeolipile is a bladeless radial steam turbine that spins when its central water container is heated.
Notes on verification
Confirmed by multiple independent sources including Britannica and reference mirrors, all agreeing on the mechanism and classification as a bladeless radial steam turbine. [cascade flags: aggregator_dropped_primary_exists | tier=unverified indep_score=0.3 clusters=2 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]