the world > plants > by growth or development > defined by habit > tree or woody plant > wood or assemblage of trees or shrubs > [adjective] > forming part of main canopy (2)
Forestry. Of a (species of) forest tree: having a crown that reaches but does not extend above the average level of the canopy. Cf. dominant, adj. 6.
Forestry. Designating the class of trees which form the lower part of a canopy at a given time; of or relating to such trees.