[ ˌagrə'stɒlədʒi ]
■ noun the branch of botany concerned with grasses.
Origin
C19: from Gk agrōstis (denoting a kind of grass) + -logy .
AGROSTOLOGY
Meaning of AGROSTOLOGY in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004