exocrinology
noun
exo·cri·nol·o·gy
ˌek-sə-kri-ˈnäl-ə-jē, -ˌkrī-, -ˌkrē-
plural exocrinologies
: the study of external secretions (as pheromones) that serve an integrative function
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Merriam-Webster unabridged
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