Roche lobe Syllabification: (Roche lobe)Entry from US DictionaryDefinition of Roche lobe noun Astronomy either of two lobes that form an hourglass-shaped volume of space around a binary star system. Origin: 1960s: named after E. A. Roche (see Roche limit)Roche lobe in other Oxford dictionaries Definition of Roche lobe in the US English dictionary
