ul·tra·thin 
(ŭl′trə-thĭn)
(ŭl′trə-thĭn)adj.
Very thin.
- synchro-
- synchrocyclotron
- synchroflash
- synchromesh
- synchronal
- synchronic
- synchronically
- synchronicity
- synchronism
- synchronistic
- synchronistical
- synchronistically
- synchronization
- synchronize
- synchronized swimming
- synchronizer
- synchronous
- synchronously
- synchronous motor
- synchronousness
- synchronous orbit
- synchronous rotation
- synchrony
- synchrotron
- synchrotron radiation