n.
Pronunciation: - ˌ sis-t ə m
Function: noun
Date: 1935
: the complex of a community of organisms and its environment functioning as an ecological unit
n.
Pronunciation: - ˌ sis-t ə m
Function: noun
Date: 1935
: the complex of a community of organisms and its environment functioning as an ecological unit
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012