| Term | Definition | Contributor | Modified |
|---|---|---|---|
| lower | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower atmosphere | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower bound | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower cretaceous | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower devonian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower heliosphere | No definition provided | Ryan McGranaghan | 2023.04.16 |
| LowerHybridFrequency | Lower hybrid oscillations involvelongitudinal motions of electrons and ions in a magnetized plasma. Thepropagation of lower hybrid waves must be close to perpendicular to thebackground magnetic field in so that electrons cannot move along field linesthus preventing wave growth. The lower hybrid frequency,ΦLH, can be calculated by usingΦLH =[(ΩceΩci)-1+Φpi-2]-1/2where Ωce andΩci are the electron and ion cyclotronfrequencies, respectively, and Phi;LH is the ionplasma frequency. | Ryan McGranaghan | 2023.04.16 |
| lower imbrian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower jurassic | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower mantle | Very little is known about the lower mantle apart from that it appears to be relatively seismically homogeneous. The lower mantle is under tremendous pressure and therefore has a higher viscosity than the upper mantle.[Wikipedia] | Ryan McGranaghan | 2023.04.16 |
| lower mississippian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower ordovician | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower pennsylvanian | No definition provided | Ryan McGranaghan | 2023.04.16 |
| lower triassic | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Lowestoft pottery | No definition provided | Christopher Rauch | 2023.12.01 |
| lowest usable frequency | The lowest frequency that allows reliable long-range HF radio communication by ionospheric refraction. | Ryan McGranaghan | 2023.04.16 |
| Lowest Usable Frequency | No definition provided | Ryan McGranaghan | 2023.04.16 |
| low frequency | That portion of the radio frequency spectrum from 30 to 300 kHz. | Ryan McGranaghan | 2023.04.16 |
| low frequency | No definition provided | Ryan McGranaghan | 2023.04.16 |
| LowFrequencyRadioArray | No definition provided | Ryan McGranaghan | 2023.04.16 |