ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷əm noun
( plural hypoclei·dia -ēə)
Etymology: New Latin, from hypo- + Greek kleidion small key, diminutive of kleid-, kleis key, hook, clavicle — more at cleid-
: a median process on the wishbone of many birds often connected with the sternum by a ligament or ossified with it