The story
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A school of thought that argues that that the reconstruction of Proto-Indo-European requires three laryngeal consonants, usually marked as ⟨h₁⟩, ⟨h₂⟩, and ⟨h₃⟩. Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.