| tobacco, smokeless | The powdered leaves of nicotiana tabacum which are either inhaled through the nose, chewed, or stored in cheek pouches. It includes any product of tobacco that is not smoked. (12 Dec 1998) |
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| tobacco smoke pollution | Contamination of the air by tobacco smoke. (12 Dec 1998) |
| environmental tobacco smoke | A complex mixture of chemical constituents and particulates released into the atmosphere from the burning tip of a cigarette, pipe or cigar or from smoke exhaled by the smoker. (09 Oct 1997) |