antro-, antr- +
(Greek: cave, cavern; in medicine, of or pertaining to a [bodily] cavity or sinus; a term in anatomical nomenclature, especially to designate a cavity or chamber within a bone)
A cross reference of other word family units that are related directly, indirectly, or partially with: "opening, hole, cavity, tract, tube": alveolo-; anu-; celo-; coelio-; concho-; fenestra-; hernio-; hiat-; meato-; ora-; parieto-; poro-; pyl-, pyle-; pylor-; sphinctero-; splanchn-; stomato-; syringo-; uretero-; urethro-; vagino-; ventricul-.