from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Fit for breathing: respirable air.
- adj. Capable of undergoing respiration: respirable organisms.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. breathable
- adj. capable of respiration
from the GNU version of the Collaborative International Dictionary of English
- adj. Suitable for being breathed; adapted for respiration.
from The Century Dictionary and Cyclopedia
- That can respire.
- Capable of or fit for being respired or breathed: as, respirable air.
Sorry, no etymologies found.
It can scarcely be called respirable, as it would not support life for any length of time; but it may be breathed for a few moments without any other effects, than the singular exhilaration of spirits I have just mentioned.
"This will be the first major advancement in monitoring miners' exposure to respirable coal dust," said Ed Thimons , branch chief for dust control, ventilation and toxic substances at NIOSH.
"Any time you have respirable particles, it's bad."
Exposure to respirable particles of free crystalline silica can lead to silicosis, a disease resulting in scarring of the lungs and impairment of their function.
An increase of bronchitis was detected even with such a small amount of ash and the relatively low respirable portion.
Mount St. Helens contained 60 percent or more free crystalline silica — far greater than the actual 3 to 7 percent of the respirable size fraction.
Monitoring of the concentration of airborne respirable dust and ash around the volcano beginning in August 1997 showed that concentrations of ash have regularly exceeded 50 micrograms/m3 per 24-hour rolling average in areas subject to frequent ash fall.
Exposure to respirable-sized free crystalline silica from most ash falls are typically of short duration (days to weeks), and data suggests that the recommended respirable exposure limit of 50 micrograms/m3 of air can be exceeded for short periods of times for the general population.
Media caution: Within days of the 1980 eruption, there were reports in the media that the volcanic ash from Mount St. Helens contained 60 percent or more free crystalline silica — far greater than the actual 3 to 7 percent of the respirable size fraction.
The U.S. National Institute for Occupational Safety and Health (NIOSH) recommended in 1974 the exposure to respirable free silica be limited to 50 micrograms/m3 of air for workers up to a 10-hour work day, 40-hour work week over a lifetime.