Apteral

Apteral (from the Greek απτερος, "wingless": α-, "without" + πτερον, "wing") is an architectural term applied to amphiprostyle temples which have no columns on the sides. In the temple Athena Nike known as "Nike Apteros", the adjective is used, not as applying to the goddess of victory but to the absence of any peristyle on the sides.

References

•  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.