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impactor

Pronunciation: /ɪmˈpaktə/

Definition of impactor

noun

chiefly Astronomy
  • an object (such as a meteorite) which collides with another body.

impactor in other Oxford dictionaries

Definition of impactor in the US English dictionary
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synodic

/ sɪˈnɒdɪk /
adjective
relating to or involving the conjunction of celestial objects …