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- noun idiomatic, nuclear physics, uncountable A
hypotheticalkind of catastrophic failurein which a nuclear reactor meltsthrough the floor of its containmentsystem and penetratesthe earth's surface, continuing downward as if (from a Western Hemisphericpoint of view) traveling through the planettoward China.
- noun idiomatic, countable, nuclear physics One
instanceof such a nuclear mishap.
- noun idiomatic, countable A
behavior, policy, or situationcharacteristic of or involving China; an actualor potential catastrophe, especially one involving China.
- noun medicine A
rare disease, first characterized in the early 1990s, which resembles poliomyelitisbut which has somewhat different characteristics and occurs in persons vaccinatedfor poliomyelitis.
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