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A pair of triangles marking a long sound.
Also known as: Triangular colon, IPA long mark, Length sign
In the International Phonetic Alphabet two small triangles stacked point to point after a letter mark the sound as long. It distinguishes the vowel of English beat from that of bit in quantity-based transcriptions.
Marks the preceding sound as long, and applies to consonants as well as vowels.
Contexts: Language and transcription
Is a distinct character from the ordinary colon, which it resembles closely enough that the two are routinely substituted in typed transcription.
Contexts: Language and transcription
Two small triangles placed one above the other, each pointing towards the other, in the position of a colon.