IPA: /ˈæptərəl/
KK: /ˈæptərəl/
Describing a structure, particularly a classical temple, that does not have columns on its sides.
The ancient temple was apteral, giving it a unique and open appearance.
Apteral is formed from "a-" (meaning without) and "pteron" (from Greek, meaning wing). The word describes a structure that is without wings, often used in architecture to refer to a temple that lacks side columns or wings.
Think of 'without' ('a-') and 'wing' ('pteron') to remember that 'apteral' refers to something that does not have wings.