snow·ball /ˈsnoˌbɔl/
 雪球,打雪仗,滾雪球式的募捐法(vt.)向…丟雪球


 Snow·ball n.
 1. A round mass of snow pressed or roller together, or anything resembling such a mass.
 2. Bot. The Guelder-rose.
 Snowball bush or Snowball tree Bot., the Guelder-rose.
 a snowball's chance in hell, [Colloq.] no chance; an infinitesimal chance.


 Snow·ball, v. t. [imp. & p. p. Snowballed p. pr. & vb. n. Snowballing.] To pelt with snowballs; to throw snowballs at.


 Snow·ball, v. i.
 1. To throw snowballs.

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 snowball
      n 1: plant having heads of fragrant white trumpet-shaped flowers;
           grows in sandy arid regions [syn: sweet sand verbena,
           Abronia elliptica]
      2: ball of ice cream covered with coconut and usually chocolate
         sauce
      3: ball of crushed ice with fruit syrup
      4: snow pressed into a ball for throwing (playfully)
      v 1: increase or accumulate at a rapidly accelerating rate
      2: throw snowballs at