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Webster 1913 Edition

Noun.

[L.

monoptotum

, Gr.

μονόπτωτος

;

μόνοσ

single + [GREEK] apt to fall, fallen, fr. [GREEK] to fall; cf. [GREEK] case.]

(Gram.)

A noun having only one case.

Andrews.

A noun having only one ending for the oblique cases.

Noun.

[Gr. only, and case.] A noun having only one oblique case.