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  • Cosmic Dust
    Cosmic Dust
    Finely divided solid matter with particle sizes smaller than a micrometeorite, thus with diameters much smaller than a millimeter, moving in interplanetary space. (NASA Thesau...<br/>Year introduced: 1997
    MeSH
  • Particulate Matter
    Particulate Matter
    Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce...<br/>Year introduced: 2007
    MeSH
  • Pyroglyphidae
    Pyroglyphidae
    Family of house dust mites, in the superfamily Analgoidea, order Astigmata. They include the genera Dermatophagoides and Euroglyphus.<br/>Year introduced: 2003
    MeSH

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