hydrobiology

noun
hy·dro·bi·ol·o·gy | \ ˌhī-drō-bī-ˈä-lə-jē \

Definition of hydrobiology 

: the biology of bodies or units of water especially : limnology

Other words from hydrobiology

hydrobiological \ˌhī-drō-ˌbī-ə-ˈlä-ji-kəl \ adjective
hydrobiologist \ˌhī-drō-bī-ˈä-lə-jist \ noun

First Known Use of hydrobiology

1926, in the meaning defined above

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The first known use of hydrobiology was in 1926

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Britannica.com: Encyclopedia article about hydrobiology

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