Ecol. a type of transitional plant community that is located between the arctic tundra and the boreal coniferous forests, having scattered trees: often it is considered to include the N regions of the boreal forests
See taiga in American Heritage Dictionary 4
(tīˈgə)
noun
A subarctic, evergreen coniferous forest of northern Eurasia located just south of the tundra and dominated by firs and spruces.