synthetical(a = adj.all)synthetic - involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis; "limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology"
synthetical(a = adj.all)synthetic - of a proposition whose truth value is determined by observation or facts; "`all men are arrogant' is a synthetic proposition"
Comprising within itself structural or other characters which are usually found only in two or more diverse groups; -- said of species, genera, and higher groups. See the Note under Comprehensive, 3. [1913 Webster]
Synthetic language, or
Synthetical language, an inflectional language, or one characterized by grammatical endings; -- opposed to analytic language.R. Morris.