Hypodiastole. Note the difference from
comma.
Hypodiastole is a textual mark developed in ancient Greek texts before the separation of words by spaces was commonplace. It was used together with the hyphen (enotikon) to mark how the words should be read correctly. A hyphen was placed between words that should be read as one, while a hypodiastole was put between words that would have been otherwise incorrectly separated. Compare «ἐστὶ,νοῦς» ("it is a mind") to «ἐστὶν,οὖς» ("it is an ear"), or «ὅ,τι» ("whatever") to «ὅτι» ("that"). The symbol looks somewhat similar to the comma but has different function and has its own character in Unicode ISO/IEC 10646 standard (U+2E12) (⸒).
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