Find the word definition

The Collaborative International Dictionary
Aptote

Aptote \Ap"tote\ ([a^]p"t[=o]t), n. [L. aptotum, Gr. ? indeclinable; 'a priv. + ? fallen, declined, ? to fall.] (Gram.) A noun which has no distinction of cases; an indeclinable noun.

Wiktionary
aptote

n. (context grammar English) A noun (sensu lato) which has no distinction of cases; an indeclinable noun.