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)

1. Inflammation of an antrum.
2. Maxillary sinusitis or inflammation of a maxillary sinus.
1. A cavity or hollow within a bone.
2. A normal dilatation within certain hollow organs; such as, the pyloric end of the stomach.
3. A general term for cavity or chamber which may have specific meaning in reference to certain organs or sites in the body.

The antrum of the stomach (gastric antrum) is a portion before the outlet which is lined by mucosa which does not produce acid. The paranasal sinuses can be referred to as the frontal antrum, ethmoid antrum, and maxillary antrum.

An operation that opens the mastoid antrum and the attic of the middle ear; antroatticotomy.

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-.