Source : Webster's Revised Unabridged Dictionary (1913)

Bathybius \Ba*thyb"i*us\, n. [NL., fr. Gr. ? deep + ? life]
   (Zo["o]l.)
   A name given by Prof. Huxley to a gelatinous substance found
   in mud dredged from the Atlantic and preserved in alcohol. He
   supposed that it was free living protoplasm, covering a large
   part of the ocean bed. It is now known that the substance is
   of chemical, not of organic, origin.