desiderium

[ des-i-deer-ee-uh m ]
/ ˌdɛs ɪˈdɪər i əm /

noun, plural des·i·de·ri·a [des-i-deer-ee-uh] /ˌdɛs ɪˈdɪər i ə/.

an ardent longing, as for something lost.

Origin of desiderium

From Latin, dating back to 1705–15; see origin at desiderate, -ium