In a manner relating to the ear, or through the ear; in an auricular or ear-related way.
From 'auricular' (relating to the ear) plus the adverb suffix '-ly.' The root is Latin 'auris' meaning ear.
Medically, when doctors say something is transmitted 'auricularly,' they mean through the ear canal—it's from the same Latin root 'auris' that gives us 'aural' (hearing) and 'auroral' (golden dawn, because of the ear-like connection to sound and light perception).
Complete word intelligence in one call. Free tier — 50 lookups/day.