Betalight

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A sealed capsule, internally coated with a phosphor and filled with a tritium whose beta decay causes the phosphor to glow.

Etymology

From beta + light.

Related phrases

beta decay

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