SMUDGE n.
A heap of damp combustibles partially ignited and burning slowly, placed on the windward side of a house, tent, or the like, in order, by the thick smoke, to keep off mosquitoes or other insects. [U. S.] Bartlett.
SOOT n.
A black substance formed by combustion, or disengaged from fuel in the process of combustion, which rises in fine particles, and adheres to the sides of the chimney or pipe conveying the smoke; strictly, the fine powder, consisting chiefly of carbon, which colors smoke, and which is the result of imperfect combustion.…
SPARK PLUG n.
In internal-combustion engines with electric ignition, a plug, screwed into the cylinder head, having through it an insulated wire which is connected with the induction coil or magneto circuit on the outside, and forms, with another terminal on the base of the plug, a spark gap inside the cylinder.
SQUIB n.
A little pipe, or hollow cylinder of paper, filled with powder or combustible matter, to be thrown into the air while burning, so as to burst there with a crack. Lampoons, like squibs, may make a present blaze. Waller. The making and selling of fireworks, and squibs . . . is punishable. Blackstone.