betalight

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noun

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

Scrabble 15
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Meanings

nounbetalight (plural betalights)

plural betalights

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

Origin

From beta + light.

Full word history & related roots →
Cite this entry
APA

betalight. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/betalight

MLA

“betalight.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/betalight. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “betalight,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/betalight.

Source: betalight on Wiktionary, CC BY-SA 4.0.