Study old diary as part of basic thematic study

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
dendrology \den*drol"o*gy\, n. [Gr. de`ndron tree + -logy: cf. F. dendrologie.] the branch of botany studying trees and shrubs; the natural history of trees. A discourse or treatise on trees. [1913 Webster] -- den`dro*log"ic*al , a. -- den`dro*log"ic , ...

Wikipedia Word definitions in Wikipedia
Dendrology (, dendron , "tree"; and , -logia , science of or study of ) or xylology (, ksulon , "wood") is the science and study of wooded plants ( trees , shrubs , and lianas ), specifically, their taxonomic classifications. There is no sharp boundary ...

Wiktionary Word definitions in Wiktionary
n. the study of trees and other woody plants

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1708, from dendro- + -ology .