blood·cur·dling 
(blŭdkûrd′lĭng)
(blŭdkûrd′lĭng)adj.
Causing great horror; terrifying.
bloodcur′dling·ly adv.
- retroflexion
- retrogradation
- retrograde
- retrograde ejaculation
- retrogradely
- retrogress
- retrogression
- retrogressive
- retrogressively
- retrolental
- retronym
- retroocular
- retroperitoneal
- retropharyngeal
- retrorocket
- retrorse
- retrorsely
- retrospect
- retrospection
- retrospective
- retrospectively
- retrotransposon
- retroussé
- retroversion
- retroviral