A History of Short Words

From the New York Times Crossword Puzzle

ACUTE

Mon, 3 Oct '22
Less than 90º, as an angle
Tue, 27 Sep '22
Like at least two angles of every triangle
Wed, 23 Mar '22
Less than right
Tue, 15 Feb '22
Less than 90º
Sat, 18 Sep '21
Not quite right
Sun, 29 Aug '21
Sharp
Wed, 3 Mar '21
Sharp
Mon, 11 Jan '21
Like an angle less than 90°