The Collaborative International Dictionary
Monoptote
Monoptote \Mon"op*tote\, n. [L. monoptotum, Gr. mono`ptwtos; mo`nos single + ? apt to fall, fallen, fr. ? to fall; cf. ? case.] (Gram.)
A noun having only one case.
--Andrews.A noun having only one ending for the oblique cases.
Wiktionary
monoptote
n. 1 (context grammar English) A noun having only one case. 2 (context grammar English) A noun having only one ending for the oblique cases.