Bent backward

Wiktionary Word definitions in Wiktionary
a. 1 bent or curved backwards. 2 (context phonetics English): Of pronunciation in which the tip of the tongue is raised and bent backwards, so that the underside of the tongue is behind the alveolar ridge or touches the palate. n. (context linguistics English) ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1776, from Modern Latin retroflexus , past participle of retroflectere "to bend back," from retro (see retro- ) + flectere "to bend" (see flexible ). The verb (1898) is a back-formation from retroflexed (1806), from the adjective.

WordNet Word definitions in WordNet
v. bend or turn backward [syn: replicate ] articulate (a consonant) with the tongue curled back against the palate; "Indian accents can be characterized by the fact that speakers retroflex their consonants"

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Retroflex \Re"tro*flex\, Retroflexed \Re"tro*flexed\, a. [Pref. retro- + L. flectere, flexum, to bend, to turn.] Reflexed; bent or turned abruptly backward.