WordReference Random House Unabridged Dictionary of American English © 2020
China syn′drome, 
  • Physicsa hypothetical nuclear-reactor accident in which the fuel would melt through the floor of the containment structure and burrow into the earth.
    • from the jocular notion that the hot reactor core would pass through to the other side of the earth 1970–75

    'China syndrome' also found in these entries (note: many are not synonyms or translations):
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