[ < idio-comb. form + glotticadj.1; compare Hellenistic Greek ἰδιόγλωσσος of distinct tongue, and slightly later idioglossian.] rare using words of one's own invention.
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1888 H. Hale in Science 28 Sept. 146/1 The boy soon gave up his idioglottic endeavors.
2006 Spectator (Nexis) 14 Jan. 39 The idioglottic poetry of deep memory breaks through the demagogue's rant.