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yellow jacket

Definitions of yellow jacket
  1. noun
    small yellow-marked social wasp commonly nesting in the ground
    synonyms: Vespula maculifrons, yellow hornet
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    type of:
    hornet
    large stinging paper wasp
  2. noun
    a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic
    synonyms: Nembutal, pentobarbital, pentobarbital sodium
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    type of:
    barbiturate
    organic compound having powerful soporific effect; overdose can be fatal
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