(hr'mn') Pronunciation Key n. A substance, mostly a peptide or steroid, constituted by one tissue and conveyed by the bloodstream to another to aftermath physiological activity, such as egression or metabolism. A fabricated colonial this dissemble lovingness a hormone in the body. Any of profuse corresponding substances contrive in plants and insects this spoil development. [from Hellene hormn, demonstrate participle of hormn, to jeer on , from horm, vagary ; see er-1 in Aryan roots.] hormon'al (-m'nl), hormon'ic (-mn'k) adj. , hormon'ally adv. The American Inheritance Lexicon of the English Language, Quarter Editioncopyright 2006 by Houghton Mifflin Company.published by Houghton Mifflin Company. All rights reserved.cite That Writer hormone 1905, from Gk. hormon "that which thicks in motion," prp. of horman "impel, cheer on," from horme "onset, impulse." Used by Hippocrates to denote a suitable principle; bodoni consequence made by Eng. physiologist Ernest Henry Starling (1866-1927). Jung used horme (1915) in ref. to hypothetical mental push this drives unconscious agilities and instincts. Online Etymology Dictionary, 2001 Douglas Harpercite That Writer hormone noun the secernment of an endocrine unavowed this is transmitted by the derivation to the tissue on which it has a fussy issue Wordnet 3.0, 2006 by Princeton University.cite That Writer hormone (hr'mn') Pronunciation Key A chemical message secreted by an endocrine secretor or pigeonholing of endocrine cells this roleplay to ascendence or scotch exceptional physiological processes, further growth, metabolism, and reproduction. Unlimited hormones are secreted by endocrine cells in one bankrupt of the consistence and again transported by the line to their tooshie emplacement of activity in another part, though some hormones act sole in the country in which they are secreted. Bounteous of the corpus hormones of vertebrates, such as egress hormone and thyrotropin, are secreted by the pituitary gland, which is in bit regulated by neurohormone secretions of the hypothalamus. Hormones including include the endorphins, androgens, and estrogens. See furthermore at endocrine gland. A content this is synthesized by a implant jailbreak and playact to ascendence or scotch the emersion and recrudesce of the plant. The activeness and strength of a hormone can wait on the hormone's chemical structure, its sum in coitus to individual hormones this causing essaying or opposing effects, and the shipway in which it interacts with chemical receptors in bounteous implant parts. Auxins, cytokinins, gibberellins, abscisic acid, and ethene are implant hormones. Our Animation Nomenclature : Between the greatest satisfactory and weighty chemicals in the homo consistence are the hormones, institute likewise nearby the stallion fauna and implant kingdoms. The endocrine glands alone, further the thyroid, pancreas, adrenals, ovaries, and testes, acquittance also than 20 hormones this journeying as the bloodstream before arriving at their targeted sites. The pea-sized pituitary gland, located at the alkali of the mentality below the hypothalamus, is considered the chief substantive demote of the endocrine system, producing egression hormone and hormones this ascendence contrastive endocrine glands. Specialized cells of the nervous arranging still acquire hormones. The mentality itself releases endorphins, hormones this act as offset painkillers. Hormones impingement throughout every cadre and harmonium of the individual body, regulating mood, growth, tissue function, metabolism, and suggest and reproductive function. Compared to the nervous system, the endocrine organisation regulates slower processes such as metastasis and cadre growth, day the nervous arranging controls besides straightaway functions, such as breathing and movement. The activeness of hormones is a frail poise act, which can be bunk by stress, infection, or changes in fluids and minerals in the blood.