ear opening1
/ˈɪə ˌəʊp(ə)nɪŋ/ /ˈɪə ˌəʊp(ə)nɪŋ/Zoology
noun
The external opening of the auditory canal, especially in reptiles, birds, and those mammals that lack a distinct pinna.
Origin
Early 19th century. From ear + opening.
ear-opening2
/ˈɪərəʊp(ə)nɪŋ/ /ˈɪərəʊpnɪŋ/adjective
Unexpectedly enlightening.
Origin
1940s; earliest use found in Abilene (Texas) Reporter-News. From ear + opening.