: the sometimes ornamented space between the right or left exterior curve of an arch and an enclosing right angle
2
: the triangular space beneath the string of a stair
Illustration of spandrel
S spandrel 1
Examples of spandrel in a Sentence
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The ironwork on the railings and lack of a spandrel wall are technological innovations of their time — but only of their time.—
Bethy Squires,
Vulture,
12 Mar. 2026 Instead of empty building space, countless species exhibit physical spandrels thanks to the summation of other useful anatomical features.—
Andrew Paul,
Popular Science,
12 Feb. 2026 Ultimately, spandrels remind us that what looks like intention or design can sometimes just be the side effect of other instincts – a pattern that emerges, not a strategy that evolved.—
Bronwyn Thompson,
New Atlas,
7 June 2025 After Friday’s initial gusty winds subsided, firefighters got a better handle on the blaze, which at one point threatened the iconic open-spandrel Bixby Canyon Bridge.—Los Angeles Times,
25 Jan. 2022 In a sense, the spandrel is leftover space, a byproduct of building with arches.—
Melissa Mohr,
The Christian Science Monitor,
27 Dec. 2021
Word History
Etymology
Middle English spandrell, from Anglo-French spaunder, from espandre to spread out — more at spawn