he·li·ot·ro·pism 
(hē′lē-ŏtrə-pĭz′əm)
(hē′lē-ŏtrə-pĭz′əm)n.
Growth or orientation of a sessile organism, especially a plant, toward or away from the light of the sun.
he′li·o·tropic (-ə-trōpĭk) adj.
- behind
- behind back
- behind bars
- behindhand
- behind (one's) back
- behind one's back
- behind the eight ball
- behind-the-scenes
- behind the scenes
- behind the times
- behind the wheel
- Behn
- be hoist with one's own petard
- behold
- beholden
- beholder
- save (one's) breath
- save one's breath
- saver
- savin
- savine
- saving
- saving clause
- saving grace
- savings account