duale tantum

Noun

 * 1)  A   that can only occur in the dual, and  lacks forms for  any other.
 * 2) * 1989, Frans Plank, “On Humboldt on the Dual” in Linguistic Categorization, eds. R. Corrigan, F.R. Eckman, and M.P. Noonan, § 2.5, :
 * The only natural-pair noun consistently preferring the dual over the plural, ὄσσε, virtually a duale tantum, refers to the eyes not as mere sense-organs but as ‘windows of the soul’.
 * The only natural-pair noun consistently preferring the dual over the plural, ὄσσε, virtually a duale tantum, refers to the eyes not as mere sense-organs but as ‘windows of the soul’.

Translations

 * German: Dualetantum