Definition of "submicron" []

• Smaller than micron-scale (adjective)

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• "And it is essentially the inhalation of submicron particles of dust that adhere to the lungs and create an inability of the lungs to exchange oxygen."
• "Treiman later told me: “Would any reasonable person conclude that there was life on Mars based on the proportion of magnesium in submicron grains of magnetite?”"
• "I look at very small submicron-size particles, 1/1000 the size of a grain of sand, located in the more diffuse regions of space where stars aren't forming."