US spelling of square metre: Standard unit of area, equal to the area of a square whose sides are one meter long.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "square meter" in a sentence
"The offices were in an unfashionable quarter of Cascadia Station, toward the tip of one branch, but the rent per square meter was only 65 percent of that near the trunk."