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pheromone (n.)

"chemical released by an animal that causes a specific response when detected by another animal of the same species," but the exact definition is much debated; 1959, coined (by Karlson & Lüscher) from Greek pherein "to carry" (from PIE root *bher- (1) "to carry," also "to bear children") + ending as in hormone.

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Definitions of pheromone

pheromone (n.)
a chemical substance secreted externally by some animals (especially insects) that influences the physiology or behavior of other animals of the same species;
From wordnet.princeton.edu