Though not the most common occurrence, Automation Engineers sometimes become Automation Engineering Managers, where the average income is $105K per year.
For example, the antrum of the stomach (gastric antrum) is a portion before the outlet, which is lined by mucosa and does not produce acid. The paranasal sinuses can be referred to as the frontal antrum, ethmoid antrum, and maxillary antrum.
(oronasal - pertaining to nose and mouth. oroantral - antrum is any structure with a cavity that's almost closed off, like a cave, so antrum is referring to the maxillary sinus, oroantral is pertaining to mouth and maxillary sinus) *ox/o.