definition of
retroflex

[1] #1 retroflex v. [replicate] bend or turn backward. wn

[2] #2 retroflex s. [retroflexed] bent or curved backward. wn

[3] #3 retroflex v. articulate (a consonant) with the tongue curled back against the palate; "Indian accents can be characterized by the fact that speakers retroflex their consonants". wn

[4] #4 retroflex s. [cacuminal] pronounced with the tip of the tongue turned back toward the hard palate. wn