The story
From ortho- + positronium.
Etymology from Wiktionary, CC BY-SA 4.0.
orthopositronium
Today it means: The state of a positronium exotic atom in which the positron and electron have parallel spins Full definition →
Today it means: The state of a positronium exotic atom in which the positron and electron have parallel spins Full definition →
From ortho- + positronium.
Etymology from Wiktionary, CC BY-SA 4.0.