Retroflex

apiko-postalveolar

(of pronunciation in which the tongue tip approaches/touches the back of the alveolar ridge)

lamino-postalveolar

(of pronunciation in which the tongue blade approaches/touches the back of the alveolar ridge)

retroflex

(of any of the retroflex pronunciations)

subapiko-palatal

(of pronunciation in which the tongue underside approaches/touches the palate)

Retroflex

(any of the retroflex consonants)