In architecture, describing a building that has colonnades on two sides, or in biology, having two wings or wing-like structures.
From Greek 'di-' (two) and 'ptera' (wings), borrowed into architectural terminology in the 17th century. It describes the visual appearance of double-winged elements in classical architecture.
Ancient Greek temples used 'dipteral' design—colonnades on two sides—and when archaeologists see this pattern, they're looking at a style choice that was super expensive and meant to impress people with your wealth and power!
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