Bosmer, or Wood Elves, are resident race of Valenwood. Bosmer, in Wood Elf tongue means 'Tree Sap People'. This could be a reference that the Bosmer live in trees (in fact, almost the entirety of Valenwood is a lush forest).
In the Elder Scrolls series, Bosmer are the most adept in projectile weapons, namely the bow. This is not all they are good for though; they are also great thieves, due to their small size. Their greater power is also well known. They can command creatures of nature, such as rats and bears.
Related ThreadsStupid Bosmers... - last post by @ Jun 24, 2009
Argonian, Khajiit, Bosmer, & Orc, New Screens - last post by @ Aug 24, 2011
Bosmer or Khajiit? - last post by @ Mar 9, 2013
Wood Elf/Bosmer Wierd Eyelashes? - last post by @ Feb 14, 2012
Angry bosmer face? - last post by @ Jan 20, 2008