Apps

Mozilla Firefox

Blog Help Center Contact Sign In

Apps

iPhone + iPad

Help Center, release notes, Download

Mac + Safari

Help Center, release notes, Download

Google Chrome

Help Center, Download

Mozilla Firefox

Help Center, Download

Opera

Help Center, Download

Microsoft Edge

Help Center, Download

Support

Download Help Center Supported languages Request a refund Restore password Restore serial codes Privacy policy

STAY IN TOUCH

Contact Twitter Blog

Site language

free services

Website translator Online translator Verb conjugator Der Die Das lookup Usage examples Words Definition Idioms

Apps

Mozilla Firefox

Blog Help Center Contact Sign In

Apps

iPhone + iPad

Help Center, release notes, Download

Mac + Safari

Help Center, release notes, Download

Google Chrome

Help Center, Download

Mozilla Firefox

Help Center, Download

Opera

Help Center, Download

Microsoft Edge

Help Center, Download

Support

Download Help Center Supported languages Request a refund Restore password Restore serial codes Privacy policy

STAY IN TOUCH

Contact Twitter Blog

Site language

free services

Website translator Online translator Verb conjugator Der Die Das lookup Usage examples Words Definition Idioms

Definition of "antrum" in English

noun

(biology) A bodily cavity, especially one having bony walls, especially one in the sinuses.