(a) Contaminant means any material which by reason of its action upon, within, or to a person is likely to cause physical harm.

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(b) Lanyard means a rope, suitable for supporting one person. One end is fastened to a safety belt or harness and the other end is secured to a substantial object or a safety line.

(c) Lifeline means a rope, suitable for supporting one person, to which a lanyard or safety belt (or harness) is attached.

(d) O.D. means optical density and refers to the light refractive characteristics of a lens.

(e) Radiant energy means energy that travels outward in all directions from its sources.

(f) Safety belt means a device, usually worn around the waist which, by reason of its attachment to a lanyard and lifeline or a structure, will prevent a worker from falling.

[44 FR 8577, Feb. 9, 1979]