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secretagog

American  
[si-kree-tuh-gog, -gawg] / sɪˈkri təˌgɒg, -ˌgɔg /
Or secretagogue

noun

Physiology.
  1. a substance or situation that promotes secretion.


Etymology

Origin of secretagog

First recorded in 1915–20; secrete 1 + -agog(ue)