Dictionary.com
Thesaurus.com

cryptophasia

American  
[krip-tuh-fay-zhuh] / krɪp təˈfeɪ ʒə /

noun

  1. the invention, by a set of twins, of a special language that they use with each other; the language so invented.

Other Word Forms

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.