noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The interaction of a photon with a medium in which it is converted into two photons of lower frequencies such that energy is conserved. countable, uncountable
2. 2
   The conversion of a high radio frequency to a lower frequency. countable, uncountable

Etymology

From down- + conversion.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.