zero gravity

Not quite, but at one point the temperature registered 29 below zero, with 21 inches of snow.
Speed Read: The Juiciest Bits From the History of ‘Purple Rain’|Jennie Yabroff|January 1, 2015|DAILY BEAST
So not only will the GOP have control in the Senate, it will move the center of gravity on Capitol Hill hard to starboard.
The Democrats’ Black Hole—and What They Can Do About It|Michael Tomasky|December 31, 2014|DAILY BEAST
In the spring of 1933, few perceived Nazism with the gravity he did.
The Catholic Philosopher Who Took on Hitler|John Henry Crosby|December 26, 2014|DAILY BEAST
The longer someone stays well, the lower their chance of relapsing, although that possibility never becomes zero.
You’re Never ‘Cured’ of an Eating Disorder|Carrie Arnold|December 20, 2014|DAILY BEAST

Is it True that “Gays vs. Traditionalists are a Zero-Sum Game”?
Do LGBTs Owe Christians an Olive Branch? Try The Other Way Around|Jay Michaelson|December 14, 2014|DAILY BEAST
The specific gravity is most conveniently estimated by means of the urinometer—Squibb's is preferable (Fig. 14).
A Manual of Clinical Diagnosis|James Campbell Todd
One frequently wishes to ascertain the specific gravity of quantities of fluid too small to float an urinometer.
A Manual of Clinical Diagnosis|James Campbell Todd
She would never forget it; but realizing its gravity, she decided thereupon never to tell it—the dream—to anybody.
The Homesteader|Oscar Micheaux
Gordon, however, had never been a lover, and if Bernard noted Angela's gravity it was not because he felt jealous.
Confidence|Henry James
But the day he planned to start was very cold—the mercury stood twenty-seven below zero.
The Homesteader|Oscar Micheaux

British Dictionary definitions for zero gravity

zero gravity

noun

the state or condition of weightlessness

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for zero gravity

zero gravity

The condition of real or apparent weightlessness occurring when any gravitational forces acting on a body meet with no resistance so the body is allowed to accelerate freely. Bodies in free fall (including trajectories like orbits) experience zero gravity; bodies at rest on the Earth's surface do not, since they are subject to the counterforce of the surface supporting them.