Definitions for "Retroflex"
Retroflex sounds are those made with the tongue being curled upwards.
articulate (a consonant) with the tongue curled back against the palate; "Indian accents can be characterized by the fact that speakers retroflex their consonants"
pronounced with the tip of the tongue turned back toward the hard palate
Reflexed; bent or turned abruptly backward.
bend or turn backward
bent or curved backward
See apical.