sub·son·ic 
(sŭb-sŏnĭk)
(sŭb-sŏnĭk)adj.
1. Of less than audible frequency.
2. Having a speed less than that of sound in a designated medium.
- enceinte
- Enceladus
- encephal-
- encephal-
- encephala
- encephalic
- encephalitic
- encephalitis
- encephalitis lethargica
- encephalization
- encephalize
- encephalo-
- encephalogram
- encephalograph
- encephalographic
- encephalographically
- encephalography
- encephaloma
- encephalomyelitis
- encephalon
- encephalopathic
- encephalopathy
- encephalous
- enchain
- enchainment