Submitted by György Chityil ... on Fri, 01/19/2018 - 18:19 Hierarchy: InitialismDescription: {{space science}} fourth Lagrange point, located 60-degrees ahead on the orbit of the smaller object in orbit around a larger oneNgram: L4Ngram Text: L4Source: WiktionaryIssue: 0Wiktionary tag: space scienceNgram Count: 1