said esp of a body part or plant part: turned or curved backward
said of a speech sound: articulated with the tongue tip turned up or curled back just under the hard palate
a retroflex consonant
retroflection /-ʹfleksh(ə)n/ noun
retroflexion /-ʹfleksh(ə)n/ noun
[scientific Latin retroflexus, from retro- + Latin flexus, past part. of flectere to bend]