A parahormonal chemical mediator of ecologic significance which is secreted, largely by an organism (usually an invertebrate) into its immediate environment (air or water); it can alter the behavior or functional activity of a second organism, often of the same species as that secreting the e.. SEE ALSO: ecological ectocrine.

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ec·to·hor·mone .ek-tə-'hȯr-.mōn n PHEROMONE
ec·to·hor·mon·al -hȯr-'mōn-əl adj

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ec·to·hor·mone (ek″to-horґmōn) a hormone secreted to the outside of the body, such as a pheromone.

Medical dictionary. 2011.

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  • ectohormone — ● ectohormone nom féminin Synonyme de substance ectocrine. ● ectohormone (synonymes) nom féminin Synonymes : substance ectocrine …   Encyclopédie Universelle

  • ectohormone — noun Any hormone that is secreted into an individuals environment and affects the behaviour or activity of another individual (of the same or different species) in the manner of a pheromone …   Wiktionary

  • ectohormone — ec·to·hormone …   English syllables

  • ectohormone — …   Useful english dictionary

  • ectocrine — 1. Relating to substances, either synthesized or arising by decomposition of organisms, that affect plant life. 2. A compound with e. properties. 3. An ectohormone. Cf.:endocrine, exocrine. [ecto + G. krino, to separate] ecological e. a chemical… …   Medical dictionary

  • Pheromone — An agent secreted by an individual that produces a change in the sexual or social behavior of another individual of the same species; a volatile hormone that acts as a behavior altering agent. The term pheromone is usually used for sexual… …   Medical dictionary

  • pheromones — A type of ectohormone secreted by an individual and perceived by a second individual of the same or similar species, thereby producing a change in the sexual or social behavior of that individual. Cf.:allelochemicals, allomones, kairomones. [G.… …   Medical dictionary

  • termone — A type of ectohormone, secreted by some invertebrate organisms, that stimulates gametogenesis. [L. ter, thrice, threefold, + hormone] …   Medical dictionary

  • HYMÉNOPTÈRES — Le super ordre des Hyménoptéroïdes groupe deux ordres d’insectes d’importance très inégale: les Hyménoptères, qui ne comptent pas moins de 280 000 espèces dont certaines comme les guêpes, les abeilles ou les fourmis sont connues de tous, et les… …   Encyclopédie Universelle

  • ectocrine — ● ectocrine adjectif Substance ectocrine, substance rejetée autour de lui par un organisme et exerçant une action définie sur les autres êtres présents dans le voisinage. ● ectocrine (expressions) adjectif Substance ectocrine, substance rejetée… …   Encyclopédie Universelle

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