Orthopositronium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The state of a positronium exotic atom in which the positron and electron have parallel spins attributive, uncountable

Etymology

From ortho- + positronium.

Related phrases

exotic atom

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