A type of wood with modified anatomical and biochemical features found in leaning stems and in the lower (in gymnosperms) or upper (in angiosperms) sides of branches.
Origin
1940s.
Definition of reaction wood in US English:
reaction wood
noun
A type of wood with modified anatomical and biochemical features found in leaning stems and in the lower (in gymnosperms) or upper (in angiosperms) sides of branches.