semiochemical

/ (ˌsɛmɪəʊˈkɛmɪkəl) /

noun

a chemical substance produced by an animal and used in communications, such as a pheromone

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Word Origin for semiochemical

C20: semio- from Greek sēmeion a sign + chemical
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012