Not related to a centrifuge.

feb·ri·fuge /ˈfɛbrəˌfyudʒ/

adjective
1. serving to dispel or reduce fever, as a medicine. 
noun
2. such a medicine or agent. 
3. a cooling drink. 

[Origin: 1680–90; < F < LL febrifugia plant good for curing fever. See febri-, -fuge]

Source: Dictionary.com.

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