pro·to·hu·man 
(prō′tō-hymən)
(prō′tō-hymən)n.
Any of various extinct hominins.
pro′to·human adj.
- unilateralist
- unilaterally
- unilinear
- unilingual
- unilobar
- unilocular
- unimaginable
- unimaginably
- Unimak Island
- unimpassioned
- unimpeachable
- unimpeachably
- unimportance
- unimportant
- unimproved
- uninformative
- uninformatively
- uninformed
- uninhabitability
- uninhabitable
- uninhabited
- uninhibited
- uninhibitedly
- uninhibitedness
- uninitiated