Source : Webster's Revised Unabridged Dictionary (1913)

Shimmering \Shim"mer*ing\, n.
   A gleam or glimmering. ``A little shimmering of a light.''
   --Chaucer.

Shimmer \Shim"mer\, v. i. [imp. & p. p. {Shimmered}; p. pr. &
   vb. n. {Shimmering}.] [OE. schimeren, AS. scimerian; akin to
   sc[=i]mian, sc[=i]man, to glitter, D. schemeren, G.
   schimmern, Dan. skimre, Sw. skimra, AS. sc[=i]ma a light,
   brightness, Icel. sk[=i]ma, Goth. skeima a torch, a lantern,
   and E. shine. [root]157. See {Shine}, v. i.]
   To shine with a tremulous or intermittent light; to shine
   faintly; to gleam; to glisten; to glimmer.

         The shimmering glimpses of a stream.     --Tennyson.