Definition of marsupialize in US English:

marsupialize

(also marsupialise)

verb

  • with object To convert (a cyst, abscess, or other cavity) into a pouch by making a permanent wide opening to the exterior.

Origin

Late 19th century; earliest use found in The British Medical Journal. From marsupial + -ize.

Pronunciation

marsupialize

/mɑːˈs(j)uːpɪəlʌɪz/