tetrachotomous

tetrachotomous

(ˌtɛtrəˈkɒtəməs)
adj
divided into four parts
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Tobacco smoking was regarded as a tetrachotomous exposure because four categories of exposure were involved: 1) nonsmoking, 2) light smoking (prevalence ETSL), 3) moderate smoking (prevalence ETSM), and 4) heavy smoking (prevalence ETSH).
Tobacco smoking, on the other hand, should be conceived as a tetrachotomous exposure; i.e., 1) non-smoker, 2) light smoker (prevalence [E.sub.TSL]), 3) moderate smoker (prevalence [E.sub.TSM]), and 4) heavy smoker (prevalence [E.sub.TSH]).