This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. comparative form of leaky: more leaky

"Blood vessels in normal tissue are impermeable to the nanoparticles, but blood vessels in tumors are "leakier," with much larger pores that allow the nanoparticles to pass through."