pheromone definition by Webster's New World
any of various chemical substances, secreted externally by certain animals, that convey information to, and produce specific responses in, other individuals of the same species
Origin: ; from Classical Greek pherein, to carry, bear plush -o- plush (hor)mone
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- pheromonal adjective
pheromone definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A chemical secreted by an animal, especially an insect, that influences the behavior or development of others of the same species, often functioning as an attractant of the opposite sex.
Origin: Greek pherein, to carry; see bher-1 in Indo-European roots + (hor)mone.
- pherˌo·monˈal adjective
pheromone - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A chemical that is secreted by an animal, especially an insect, and that influences the behavior or development of others of the same species.
pheromone - Science Definition
A chemical secreted by an animal that influences the behavior or development of other members of the same species. Queen bees, for example, give off a pheromone that prevents other females in the hive from becoming sexually mature, with the result that only the queen bee mates and lays eggs. In many animal species, pheromones are used to establish territory and attract mates.A Closer Look The release of pheromones is one of various forms of nonverbal communication many animals use to transmit messages to other members of the same species. The complex molecular structure of pheromones allows these chemical messages to contain a great deal of often very specific information. The pheromone released by sexually receptive silkworm moths, first isolated in the 1950s, is one of the best-studied examples. The pheromone bombykol, released by the female from a gland in her belly, is detectable by male silkworm moths up to several kilometers away. The male identifies the chemical in the environment with tiny receptors at the tip of his antennae and is then able to hone in on the female. Hornets, when disturbed, release an alarm pheromone that calls other hornets to their aid. Female mice pheromones may excite a male mouse to mate immediately. In addition to producing instinctive behavioral responses, pheromones can also produce changes in an animal's physiology, spurring the onset of puberty or bringing on estrus. Pheromones used by animals, such as cats and dogs, to mark territory can convey information about an animal's species, gender, age, social and reproductive status, size, and even when it was last in the area. But can humans communicate via chemicals, too? In the 1970s Martha McClintock showed that the menstrual cycles of women living closely together in dormitories tended to become synchronized, an effect thought by some to be mediated by pheromones. Despite such evidence, no pheromone receptors have yet been found in humans.