Noun : The new English professor marks on a curve.    From Dictionary.com. 

Am I the blue curve of day around thine uncurved night?.    From Wordnik.com.  [The Plumed Serpent] Reference

"I would not," Trent said with a remarkably uncurved complexion.    From Wordnik.com.  [Harpy Thyme]

The lawyers for the university deserve a C– curved or uncurved for their motion to dismiss.    From Wordnik.com.  [The Volokh Conspiracy » Although I Realize Students Often Don’t Like Grading on a Curve,] Reference

Totally devoid of mass, space would be entirely uncurved, would be a straight line and would have no real existence.    From Wordnik.com.  [The Cosmic Engineer]

He failed - never realizing that it was his own assumption of a locally-uncurved space-time that doomed all his efforts to failure.    From Wordnik.com.  [Chapter 4] Reference

After all, if the local space-time is uncurved, it means there is no local general relativity. (2) it assumed that it was impossible to utilize the far stronger EM forces (which are some 10exp36 to 10exp42 times as strong as the G-force) to make gravitational potential.    From Wordnik.com.  [Chapter 4] Reference

It would also look less obtrusive in a pocket than a thinner but uncurved phone.    From Wordnik.com.  [Techworld.com News] Reference

The crooked fingers clutched the hickory staff, as if eager to wield it; the sunken gray eyes shot forth angry fire, and the broken figure uncurved and straightened itself with a wrathful curiosity.    From Wordnik.com.  [The Story of Kennett] Reference