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usually uncountable, plural cryptologies
The science or study of mathematical, linguistic, and other coding patterns and histories. examples
The practice of analysing encoded messages, in order to decode them. examples
Secret or enigmatical language. quotations examples
But the question of speech-play causes confusion to the slang researcher because this subject borders on family slang, private lingo, secret language, cryptologies, disguised language of children and grown-ups
1991, English Studies