sootless

• a word derived from soot.
  soot

  noun

  a black, carbonaceous substance produced during incomplete combustion of coal, wood, oil, etc., rising in fine particles and adhering to the sides of the chimney or pipe conveying the smoke: also conveyed in the atmosphere to other locations.

Example Sentences

See Examples For:

sootless

To call attention to its antipollution efforts, Armco Steel ran an ad showing its Ashland, Ky., plant under sootless blue skies.

From Time Magazine Archive

By means of rotating the air column around the cylinder axis, fresh air was constantly led along the fuel spray to achieve completely sootless burning-up....

From The First Airplane Diesel Engine: Packard Model DR-980 of 1928 by Robert B. Meyer

Related Words

• ash
• grit
• gunk
• residue
• sediment
• smoke