bar·bi·cel 
(bärbĭ-sĕl′)
(bärbĭ-sĕl′)n.
One of the minute, hooked projections extending from and interlocking the barbules of a feather.
[New Latin barbicella, diminutive of Latin barba, beard; see bhardh-ā- in the Appendix of Indo-European roots.]
- unequally
- unequivocal
- unequivocally
- unerring
- unerringly
- UNESCO
- unessential
- uneven
- uneven bars
- unevenly
- unevenness
- uneventful
- uneventfully
- unexampled
- unexceptionable
- unexceptionably
- unexceptional
- unexceptionally
- unexpected
- unexpectedly
- unexpectedness
- unexploited
- unexpressed
- unexpressive
- unexpressively