leakproofness
nounEtymology From leakproof + -ness.
1
The quality of being leakproof.
- This means, of course, from 50 to 80 per cent. less friction, and as the maximum compression is obtained owing to the leakproofness, an increase in power is said to result from their use.1914, Cycle and Automobile Trade Journal, volume 18, page 147: