Source : Webster's Revised Unabridged Dictionary (1913)

Monoptote \Mon"op*tote\, n. [L. monoptotum, Gr. ?; mo`nos single
   + ? apt to fall, fallen, fr. ? to fall; cf. ? case.] (Gram.)
   1. A noun having only one case. --Andrews.

   2. A noun having only one ending for the oblique cases.