Definition of "eustachian" [eu•sta•chi•an]

• Discovered by Eustachius. (adjective)
• Pertaining to the Eustachian tube. (adjective)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "On an airplane a baby may cry for their usual reasons, but they may also experience ear pain due to their narrower eustachian tubes behind the eardrum becoming blocked."
• "In children, the thin and flexible eustachian tube between the inner ear and nasal cavity often collapses and fails to drain an infected ear."
• "Amusing typo of the day 'station tube'.... er that should be eustachian tube, methinks."