breastsummer

[bres-suhm-er, brest-, bres-uh-mer]

noun Architecture.

a horizontal beam supporting an exterior wall over an opening, as a shop window.

Origin of breastsummer

First recorded in 1605–15; breast + summer²

Also called breast beam.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018