The story
Reintroduced by Jakob Steiner (1853), who was unaware of earlier work on the topic.
Etymology from Wiktionary, CC BY-SA 4.0.
Steiner system
Today it means: In combinatorial mathematics, a type of block design, specifically a t-design with λ = 1 and t = 2 or (recently) t ≥ 2. Full definition →