7-dehydrocholesterol

[ -dē-hī′drō-kə-lĕs′tə-rôl′, -rōl′ ]

Save This Word!

A provitamin present in the skin of humans as well as the milk of mammals that becomes vitamin D3 when exposed to ultraviolet light.

QUIZ

GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!

Test how much you really know about regular and irregular plural nouns with this quiz.

Question 1 of 9

Which of the following nouns has an irregular plural form?

Words nearby 7-dehydrocholesterol

The same went for the somewhat more modern JH-7 light bomber.
How China Will Track—and Kill—America’s Newest Stealth Jets|Bill Sweetman|December 2, 2014|DAILY BEAST
In the meantime, Douglass had pulled into a lower parking lot to start an 11 p.m.-to-7 a.m. shift.
Manhunt for a Cop-Hating Pennsylvania ‘Survivalist’|Michael Daly|September 17, 2014|DAILY BEAST
Co -7, IA -7, NH -7, WI-7, VA -5, NV -4, MI -4, FL -3, NC -3, MN -3, OH -2.
Various Thoughts: Demography, Rove, Morris, the Great Nate, &c.|Michael Tomasky|November 7, 2012|DAILY BEAST
Before the magnitude-7.0 earthquake devastated Haiti, killing 220,000 people, the country was the poorest in the Americas.
Michel Martelly—Can He Lead?|Lois Romano|September 21, 2011|DAILY BEAST

At station G-7 on July 8, 41.8 per cent of the fish taken were of this species.
Fishes of Chautauqua, Cowley and Elk Counties, Kansas|Artie L. Metcalf
An atom of lithium-7 plus an atom of hydrogen-1 yields two atoms of helium-4 and plenty of energy.
Unwise Child|Gordon Randall Garrett
I do not only use it for baby chicks, but for those5-7 weeks' of age.
Pratt's Practical Pointers on the Care of Livestock and Poultry|Pratt Food Co.
Lap the ends one inch and fasten each end with tie wire.7-2 Wire always laps one inch—no more, no less.
Make Your Own Hats|Gene Allen Martin
And this bears the numbers C-14 and C-7, and is a firing-pin photograph?
Warren Commission (3 of 26): Hearings Vol. III (of 15)|The President's Commission on the Assassination of President Kennedy