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Multi-word Results
| D layer |
the lowest layer of the ionosphere, about forty-five to eighty miles above the earth. |
| E layer |
a thick layer of ions located at a height of about sixty to ninety miles in the E region of the earth's outer atmosphere and having the ability to deflect radio waves. |
| F layer |
the highest zone of the ionosphere, between 120 and 250 miles above the earth. |
| germ layer |
any of the three primary cell layers in an embryo which differentiate into various body parts as the fetus develops. |
| Heaviside layer |
see "E layer." |
| layer cake |
a cake made in two or more layers that are separated by icing, preserves, or the like. |
| ozone layer |
an atmospheric layer between ten and twenty miles above the earth that contains a substantial concentration of ozone, which absorbs ultraviolet radiation from space and prevents some heat loss from the earth; ozonosphere. |
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