anosmia n 1: absence of the sense of smell (as by damage to olfactory nasal tissue or the olfactory nerve or by obstruction of the nasal passages)
anosmia \a*nos"mi*a\ ([a^]n*[o^]z"m[-e]*[.a]), n. [NL., fr. Gr. 'an priv. + 'osmh` smell.] (Med.) Loss of the sense of smell. AS [1913 Webster]