benthoscope

== English == === Etymology === From bentho- +‎ -scope. Likely generalised from Benthoscope. === Noun === benthoscope (plural benthoscopes) A deep-sea submersible, consisting of a hollow sphere made of steel, able to bring a person to depths of a few thousand feet. ==== References ==== “benthoscope”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.