Definition from Wiktionary, the free dictionary
minisub (plural minisubs)
- (informal) A minisubmarine.
2007 October 2, John Tagliabue, “For the Yachting Class, the Latest Amenity Can Take Flight”, New York Times:
- The minisub, said Erik Hasselman, U-Boat Worx’s head of sales and marketing, is ideal for stowing on a yacht, but for safety reasons can dive only to about 160 feet, where there is still surface light.