The story
After mathematician John Leech, who discovered it in 1967.
Etymology from Wiktionary, CC BY-SA 4.0.
Leech lattice
Today it means: An even unimodular lattice Λ₂₄ in 24-dimensional Euclidean space, which is one of the best models for the problem of finding the maximum possible kissing number for n-dimensional spheres in (n + 1)-dimensional Euclidean space. Full definition →