tough protective covering of the woody stems and roots of trees and other woody plants
is a part of
(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
is a part of
a division of a stem, or secondary stem arising from the main stem of a plant
is a part of
the main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber
is a type of (narrower)
a natural object that covers or envelops
"under a covering of dust"; "the fox was flushed from its cover"