very low frequency Definition

vlf, elves, synchrotron, whistler, bass, subwoofer, elf, line, baas, basa, flat, hum, delta wave, woofer, omnirange, resonance, long wave, pumped, pumps, interferometer, ulf, radar, oscillograph, subsonic, delta rhythm, moderate, quiet, agranulocytosis, buttonwood, glue, depressed, poor, sandal, down, few, hogback, little, lower, meagre, minimal, nothing, reduced, scarce, shortly, slight, small, terrible, tuba, barely, saturation, vhf, ultrasound, cryogenics, d region, chf, d-layer, low-pitched, magnetron, theta rhythm, theta wave, tornillo, cryogenic, monitor, superconductivity, buzz, cryogen, cryometer, cryostat, dull, gondola, monitoring, supergiant, cryobiology, fungus, giant, microtherm, pariah, peppercorn rent, awful, bass drum, buzzing, cent, chaparral, cheap, chelate, chelating, crenulate, dulled, dump, dutch, elevation, fan, harvey process, helium, insignificant, lethargy, limited, lowest, mongolia, puffinus,