The Collaborative International Dictionary of English v.0.48:

Glimmer \Glim"mer\, n.
   1. A faint, unsteady light; feeble, scattered rays of light;
      also, a gleam.
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            Gloss of satin and glimmer of pearls. --Tennyson.
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   2. Mica. See Mica. --Woodsward.
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   Glimmer gowk, an owl. [Prov. Eng.] --Tennyson.
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