ch
Ch is a two-letter combination found in many Latin-script languages and used to denote a variety of concepts. In orthography, it often represents a specific phoneme whose value varies by language. For example, in English it commonly corresponds to the /tʃ/ sound as in chair; in Spanish it has historically been treated as a distinct letter, though it is now considered a digraph rather than a separate character; in German and French, the pronunciation can differ depending on context, such as /x/ or /ç/ in German and /ʃ/ in French. Because of these differences, the digraph ch is sometimes described as representing a range of sounds rather than a single phoneme.
In geography and international codes, CH is the country code for Switzerland. The designation stems from Confoederatio
In chemistry, CH denotes the methylidyne radical, a diatomic species consisting of one carbon atom bonded to
Other common uses include the abbreviation Ch., which is often used to indicate a chapter in books,