Medical Dictionary

H–substance

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noun H–sub·stance \ˈāch-ˌsəb-stən(t)s\

Medical Definition of H–substance

  1. :  a diffusible substance that is thought to be released in the allergic reaction of skin and in the responses of tissue to inflammation and that is held to be similar to histamine or possibly to be histamine itself


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capable of being understood in two ways

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