a square unit of area, one em on each side.
a quad having such an area.Compare quad2(def 1).
How To Use The Em DashEm Dash: What is it and how do you use it? An em dash is a punctuation mark that can be used in many ways. What about the en dash vs em dash?
What Are En Dashes?You don’t hear as much about them as other dashes, but you’ve most likely seen them around. En dashes (–) can denote a range or connect the endpoints of a route. They can also show a contrast or connection between two words. You can use them to replace the words to, and, or versus. An en dash is longer than a hyphen (–) and shorter …
Origin of em quad
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019