stomato-, stomat-, stom-, -stoma, -stomatous, -stomous, -stome, -stomy, -ostomy, -ostome,

(Greek: mouth, opening; orifice)

ventriculostomy (s) (noun), ventriculostomies (pl)
The surgical creation of an opening in a cerebral ventricle: In her book on medicine, Sherry read about a ventriculostomy, a neurosurgical operation, that requires making a hole inside a cerebral ventricle for drainage.

A cross reference of other word family units that are related directly, indirectly, or partially with: "opening, hole, cavity, tract": alveolo-; antro-; anu-; celo-; coelio-; concho-; fenestra-; hernio-; hiat-; meato-; ora-; parieto-; poro-; pyl-, pyle-; pylor-; sphinctero-; splanchn-; syringo-; uretero-; urethro-; vagino-; ventricul-.