root system

English Thesaurus

1. a developed system of roots (noun.plant)

hypernym	:	scheme, system,
definition	:	a group of independent but interrelated elements comprising a unified whole (noun.group)

part holonym	:	root,
definition	:	(botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground (noun.plant)