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/ˈagənist/ Noun, pl. agonists 1. An agonist is a chemical that binds to some receptor of a cell and triggers a response by that cell. Agonists often mimic the action of a naturally occurring substance. ( 2. (Pharmacology) A molecule that combines with a receptor on a cell to trigger physiological reaction. An example is an acetylcholine being the agonist that combines with the cholinergic receptor. ( 3. (Histology) A muscle that contracts while another muscle relaxes, e.g. when bending the elbow the biceps are the agonist....

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/ˈagriˌkəlCHər/ Noun 1. Branch of Biology that deals with the study of producing crops from the land, with an emphasis on practical applications. 2. The science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products. ( Syn: farming or husbandry. Word origin: from Latin agricultūra, from ager (a field); and cultūra (cultivation) in the strict sense of “tillage of the...

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