Baby jumper

jumper \jump"er\ (j[u^]mp"[~e]r), n.
   1. One who, or that which, jumps.
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   2. A long drilling tool used by masons and quarrymen.
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   3. A rude kind of sleigh; -- usually, a simple box on runners
      which are in one piece with the poles that form the
      thills. [U.S.] --J. F. Cooper.
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   4. (Zool.) The larva of the cheese fly. See {Cheese fly},
      under {Cheese}.
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   5. (Eccl.) A name applied in the 18th century to certain
      Calvinistic Methodists in Wales whose worship was
      characterized by violent convulsions.
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   6. (Horology) spring to impel the star wheel, also a pawl to
      lock fast a wheel, in a repeating timepiece.
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   {Baby jumper}. See in the Vocabulary.

   {Bounty jumper}. See under {Bounty}.
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Baby jumper \Ba"by jump`er\
   A hoop suspended by an elastic strap, in which a young child
   may be held secure while amusing itself by jumping on the
   floor.
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