retroflexion

[re-truh-flek-shuh n] /ˌrɛ trəˈflɛk ʃən/
noun
1.
a bending backward.
2.
Pathology. a bending backward of the body of the uterus upon the cervix.
3.
Phonetics.
  1. retroflex articulation.
  2. the acoustic quality resulting from retroflex articulation; r-color.
Also, retroflection.
Origin
1835-45; < Neo-Latin retrōflexiōn- (stem of retrōflexiō), equivalent to Latin retrōflex(us) retroflex + -iōn- -ion
British Dictionary definitions for retroflexion

retroflexion

/ˌrɛtrəʊˈflɛkʃən/
noun
1.
the act or condition of bending or being bent backwards
2.
(phonetics) the act of turning the tip of the tongue upwards and backwards towards the hard palate in the articulation of a vowel or a consonant
retroflexion in Medicine

retroflexion ret·ro·flex·ion (rět'rō-flěk'shən)
n.
A backward bending, especially of the body of the uterus toward the cervix.