hyp·na·gog·ic also hyp·no·gog·ic 
(hĭp′nə-gŏjĭk, -gōjĭk)
(hĭp′nə-gŏjĭk, -gōjĭk)adj.
1. Inducing sleep; soporific.
2. Of, relating to, or occurring in the state of intermediate consciousness preceding sleep: hypnagogic hallucinations.
[French hypnagogique : Greek hupnos, sleep; see HYPNO- + Greek agōgos, leading (from agein, to lead; see ag- in the Appendix of Indo-European roots).]
- extensiveness
- extensometer
- extensor
- extent
- extenuate
- extenuation
- extenuative
- extenuator
- extenuatory
- exterior
- exterior angle
- exteriority
- exteriorize
- exteriorly
- exterminate
- extermination
- exterminative
- exterminator
- exterminatory
- extern
- external
- external auditory canal
- external capsule
- external-combustion engine
- external ear