The voiced retroflex implosive is a type of consonantal sound. It is not known to be phonemically distinct from alveolar in any language. Sindhi has an implosive that varies between dental and retroflex articulation, while Oromo, Saraiki and Ngad'a have but not . The symbol for this, (a D with a tail for retroflex and a hook-top for implosive), is not "explicitly" approved by the IPA, but is mentioned in the IPA Handbook. Features Features of the voiced retroflex implosive: Occurrence See also List of phonetics topics References External links Implosives Central consonants Retroflex consonants Voiced oral consonants