three-square

American  

[three-skwair] / ˈθriˈskwɛər /

adjective

1. having an equilateral triangular cross section, as certain files.

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three-square British  

adjective

1. having a cross section that is an equilateral triangle

   a three-square file

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Etymology

Origin of three-square

1400–50; late Middle English thre square threefold, modeled on foursquare

Example Sentences

According to one account, the sulfurous stank emanating from the White House lawn polluted the air for about three-square miles.

From Salon

What if you weren’t merely confined to your house or apartment or the three-square feet of hot-desk space provided at your company’s headquarters, 45 soul-killing minutes from where you live?

From New York Times

To qualify, residents must have lived in a roughly three-square mile area in Peshtigo and lived in or owned a residence with a private well between Jan. 1, 1965, and Dec. 31, 2020.

From Washington Times

Yongbyon meanwhile, the official said, “is a sprawling three-square mile site, with more than 300 different separate facilities located on it, all of which are dedicated to supporting the nuclear weapons program in North Korea.”

From The Guardian

Decontamination work in a so-called hot-zone, about three-square blocks around the blast site at 21st Street and Fifth Avenue, has been continuing since Thursday.

From New York Times