The Collaborative International Dictionary of English v.0.48:

Sprinkle \Sprin"kle\ (spr[i^][ng]"k'l), v. t. [imp. & p. p.
   Sprinkled (-k'ld); p. pr. & vb. n. Sprinkling
   (-kl[i^]ng).] [OE. sprenkelen, freq. of sprengen to sprinkle,
   to scatter, AS. sprengan, properly, to make to spring,
   causative of springan to spring; akin to D. sprenkelen to
   sprinkle, G. sprengen. See Spring, v. i., and cf.
   Sprent.]
   1. To scatter in small drops or particles, as water, seed,
      etc.
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   2. To scatter on; to disperse something over in small drops
      or particles; to besprinkle; as, to sprinkle the earth
      with water; to sprinkle a floor with sand.
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   3. To baptize by the application of a few drops, or a small
      quantity, of water; hence, to cleanse; to purify.
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            Having our hearts sprinkled from an evil conscience.
                                                  --Heb. x. 22.
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The Collaborative International Dictionary of English v.0.48:

Sprinkling \Sprin"kling\ (-kl[i^]ng), n.
   1. The act of one who, or that which, sprinkles.
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            Baptism may well enough be performed by sprinkling
            or effusion of water.                 --Ayliffe.
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   2. A small quantity falling in distinct drops or particles;
      as, a sprinkling of rain or snow.
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   3. Hence, a moderate number or quantity distributed like
      separate drops, or as if scattered like drops. --Craik.
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WordNet (r) 3.0 (2006):

sprinkling
    n 1: a small number (of something) dispersed haphazardly; "the
         first scatterings of green"; "a sprinkling of grey at his
         temples" [syn: scattering, sprinkling]
    2: a light shower that falls in some locations and not others
       nearby [syn: scattering, sprinkle, sprinkling]
    3: the act of sprinkling water in baptism (rare) [syn:
       aspersion, sprinkling]
    4: the act of sprinkling or splashing water; "baptized with a
       sprinkling of holy water"; "a sparge of warm water over the
       malt" [syn: sprinkle, sprinkling, sparge]