What is "multibar"

Usage examples of "multibar".

I was surprised to note that it was not a bubblene dome—bubblene being the material from which all floating city-bubbles are made, because it is one of the few substances tough enough to withstand the multibar pressures of the big atmospheres—but a comparatively flimsy plastic one.

I was surprised to note that it was not a bubblene dome-bubblene being the material from which all floating city-bubbles are made, because it is one of the few substances tough enough to withstand the multibar pressures of the big atmospheres-but a comparatively flimsy plastic one.