mes|o|scaph

mes|o|scaph or mes|o|scaphe «MEHS uh skaf, -skayf; MEE suh-», noun.

an apparatus similar to the bathyscaph, used to explore the middle depths of the ocean: »

The existence of these many portholes, with the possibility of looking in virtually every direction, is a principal characteristic of the mesoscaph and distinguishes her from naval or combatant submarines (Jacques Piccard).

╂[< French mésoscaphe, coined by its inventor, the French deep-sea explorer Jacques Piccard, born 1922, < Greek mésos middle + skáphē vessel]