You know what it looks like… but what is it called?
TAKE THE QUIZ“F1”
We have one entry that includes the term F1.
F1 layer
noun: the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface
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- Rachel seemed to be _____ in every endeavor she started.
You can make only 12 words. Pick the best ones!
PLAYLove words? Need even more definitions?
Merriam-Webster unabridged