digram
Noun: 1. A pair of successive letters: A digram is a sequence of two letters that appear consecutively in a word. In linguistics, it often specifically refers to a pair of letters that represent a single sound (phoneme) not directly represented by either letter alone.
The term "digram" is primarily used in technical contexts such as linguistics, cryptography, and data analysis. It refers to the fundamental unit of two-letter combinations within a text. * In linguistics and phonics, a digram is a two-letter grapheme that represents one sound, like 'sh' in ship or 'ea' in head. * In cryptanalysis and frequency analysis, studying digram frequencies (like 'th', 'er', 'an') is a common method for breaking codes. * In computational linguistics, digram models are used for text prediction and analysis.
- Linguistics: "The digram 'ph' represents the /f/ sound in words like and ."
- Cryptography: "The cipher was vulnerable to an attack based on digram frequency."
- General: "In the word 'letter', 'tt' is a digram."
- Digram Frequency: The statistical occurrence rate of specific two-letter combinations in a given language or text. For example, 'th' has a very high digram frequency in English.
- Digram Cipher: A type of substitution cipher where pairs of letters (digrams) are encrypted as units, rather than single letters.
- Digraph: This is a more common and often synonymous term, especially in linguistics and education, for a pair of letters representing one sound (e.g., 'ch', 'ng'). Some distinctions are made in specialized fields, but for general purposes, they are interchangeable.
- Bigram: A term used predominantly in computational linguistics and natural language processing, identical in meaning to 'digram' (a sequence of two adjacent items, usually letters or words).
- Trigram: A sequence of three successive letters or items.
- Letter pair
- Two-letter combination
- Digraph (in most contexts)
- Bigram (in computational contexts)
The core meaning of "digram" is simply a pair of consecutive letters. Its most specific and common application is in the context of orthography (writing systems) and phonetics, where it denotes a two-letter unit for a single sound. It is a technical term not typically used in everyday conversation.
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two successive letters (especially two letters used to represent a single sound: `sh' in `shoe')
