bryology
noun
bry·ol·o·gy brī-ˈä-lə-jē 
1
: moss life or biology
2
: a branch of botany that deals with the bryophytes
bryological
brī-ə-ˈlä-ji-kəl
adjective bryologist
brī-ˈä-lə-jist
noun 
Word History
Etymology
Greek bryon moss (akin to Greek bryein to grow luxuriantly) + International Scientific Vocabulary -logy
First Known Use
circa 1848, in the meaning defined at sense 1