D layer

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noun

the lowest region of the ionosphere, characterized by mounting electron and ion density: exists, during the day only, from about 43 to 50 miles (70 to 80 km) altitude.

QUIZ

QUIZ YOURSELF ON "WAS" VS. "WERE"!

Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.

Question 1 of 7

“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

true

false

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Compare D region.

Origin of D layer

First recorded in 1930–35

Words nearby D layer

DKA, dkg, dkl, dkm, dl, D layer, DLC, D. Lit., D. Litt., DLL, D.L.O.

How to use D layer in a sentence

“Gronkowski” itself never manages to sound more erotic than the name of a hearty Polish stew or a D-list WWE performer.
‘A Gronking to Remember’ Speed Read: 8 Naughtiest Bits|Emily Shire|January 7, 2015|DAILY BEAST
Just who is crazy enough to go swimming when the pond across the street has a layer of ice across the top?
Diving Into 2015 With Polar Bear Plunge Extremists|James Joiner|January 1, 2015|DAILY BEAST
I take calcium and vitamin D supplements, but prescription medications are generally only for women in menopause.
You’re Never ‘Cured’ of an Eating Disorder|Carrie Arnold|December 20, 2014|DAILY BEAST
Then Pascal responds (in all caps) with, “BUT WE DIDNT WIN A D [sic] YOU KNOW HIM.”
Exclusive: Sony Emails Blast David O. Russell For Allegedly ‘Feeling Up’ Transgender Niece|William Boot|December 14, 2014|DAILY BEAST

The move gets an “A” for symbolism and a “D” for everything else.
Sony Blames North Korea for Hacking, but Washington Left Them Completely Vulnerable|Gordon G. Chang|December 3, 2014|DAILY BEAST
It separates into three layers upon standing—a brown deposit, a clear fluid, and a frothy layer.
A Manual of Clinical Diagnosis|James Campbell Todd
C was a Captain, all covered with lace; D was a drunkard, and had a red face.
Boys and Girls Bookshelf; a Practical Plan of Character Building, Volume I (of 17)|Various
D'o l'on peut aussy veoir, quelle esperance il y a de planter une belle chrestient par tels evangelistes.
The Jesuit Relations and Allied Documents, Vol. II: Acadia, 1612-1614|Various
Neither of us spoke again, and at length the squat log buildings of Pend d' Oreille loomed ahead of us in the night.
Raw Gold|Bertrand W. Sinclair
He picked out that simple little study of Cramer in D major in the first book—you know it well—and asked me to play it.
Music-Study in Germany|Amy Fay

Scientific definitions for D layer

D layer

See D region.