Araeostyle (Gr. αραιος, "weak" or "widely spaced", and στυλος, "column") is an architectural term for the intercolumniation given to those temples where the columns had only timber architraves to carry.
References
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.