Xylology — the branch of dendrology about the gross and minute structure of wood. It is composed of `xylo-` (derived from the Greek `xylon`= `wood`) and `-logy`, meaning `science of`, `study of`. ...
study of wood
• (n.) The branch of dendrology treating of the gross and minute structure of wood.
Xy·lol'o·gy noun [ Prefix xylo- + -logy .] The branch of dendrology treating of the gross and minute structure of wood. 
xylology The science of woods and forests.