American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Having an equilateral triangular cross section: a three-square file.
Century Dictionary and Cyclopedia
- See square.
GNU Webster's 1913
“Court documents say three people left a campfire unattended Tuesday and high winds spread the embers into the forest, burning through more than three-square miles.”
“Brackish marsh species include giant cordgrass (Spartina cynosuroides), salt marsh bulrush, common three-square, soft-stem bulrush, broadleaf cattail, arrowhead, spider-lily, salt reedgrass, reed and arrow arum.”
“The police are focusing their search on a three-square mile area surrounding the Cruz home.”
“When you contrast that to the fact that we have dozens of shootings in our communities on a daily base this Los Angeles County -- and we have a three-square - mile radius in Los Angeles County where on track to have about 120 homicides this year.”
“- Sharpening of the saw (filing of the teeth) · Select a three-square file with a cross-section that is equal to the form of the tooth space.”
“- When adjusting smaller teeth file out with a three-square file.”
“Knife, three-square or square files with fine cut are used for sharpening.”
“(Flat scraper, pull-type scraper, curved bearing scraper, three-square scraper.) 5.”
“In their preparation three articles are essential; first a three-square hard-steel file or preferably a glass-worker's knife of hard Thuringian steel for cutting glass tubes etc.; next a blowpipe flame, for although much can be done with the ordinary Bunsen burner, a blowpipe flame makes for rapid work; and lastly a bat's-wing burner.”
“The triangular or three-square form is such a form also as is seldom chosen by any that may make another choise.”
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