American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
WordNet
(3)
Elsewhere on the web
The horizontal, submersible, and vertical slurry pumps are designed for medium to ultra severe duty applications such as coke fines, process plant and tailings, nuclear sludge as well as specialty applications like API 610.— Engineering News | Home
It's completely submersible, and you just might be tempted to use it for a game of pool dodgeball, but I would have to caution against it.— Gizmodo
After about four painstaking hours of maneuvering the submersible, the researches used its robotic arm to plug the camera into the observatory.— The Journal-Standard Homepage RSS

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a year.