retroflex
ret.ro.flex or ret.ro.flexed \'re-tr*-.fleks\ \-.flekst\ aj [ISV, fr. NL retroflexus, fr. L retro- + flexus, pp. of fl]ectere to bend 1: turned or bent abruptly backward : REFLEXED 2: articulated with or involving the participation of the tongue tip turne d up or curled back just under the hard palate {~ vowel}