ep·si·lon 
(ĕpsə-lŏn′, -lən)
(ĕpsə-lŏn′, -lən)n.
The fifth letter of the Greek alphabet. See Table at alphabet.
[Greek e psīlon, simple e, from neuter of psīlos, simple.]
- quartz
- quartz crystal
- quartz glass
- quartziferous
- quartzite
- quartz lamp
- quartzose
- quasar
- quash
- quash
- quasi
- quasi-
- quasicrystal
- quasicrystalline
- Quasimodo
- quasiparticle
- quasi-stellar object
- quassia
- quatercentenary
- quaternary
- quaternary ammonium compound
- quaternary structure
- quaternion
- quatrain
- quatrefoil