lim·nol·o·gy 
(lĭm-nŏlə-jē)
(lĭm-nŏlə-jē)n.
The study of the physics, chemistry, geology, and biology of lakes and other inland waters.
[Greek limnē, lake + -LOGY.]
lim′no·logi·cal (-nə-lŏjĭ-kəl) adj.
lim′no·logi·cal·ly adv.
lim·nolo·gist n.