re·trorse 
(rĭ-trôrs, rētrôrs′)
(rĭ-trôrs, rētrôrs′)adj.
Directed or turned backward or downward.
[Latin retrōrsus, from retrōversus : retrō-, retro- + versus, past participle of vertere, to turn; see wer-2 in the Appendix of Indo-European roots.]
re·trorsely adv.