(n) a random cell movement that occurs in the absence of a concentration gradient of chemoattractants, chemotactic agents that induce a cell to migrate toward them
(n) movement of a motile cell or organism, or part of one, in a direction corresponding to a gradient of increasing or decreasing concentration of a particular substance.
n. [ Chemical + Gr. &unr_; a loosing. ] A term sometimes applied to the decomposition of organic substance into more simple bodies, by the use of chemical agents alone. Thudichum. [ 1913 Webster ]
‖n. [ NL., fr. Gr. &unr_; a swelling of the cornea resembling a cockleshell, fr. &unr_; a gaping, hence a cockleshell. ] (Med.) Inflammatory swelling of the conjunctival tissue surrounding the cornea. -- Che*mot"ic a. [Webster 1913 Suppl.]
n. adsorption (especially when irreversible) by means of chemical instead of physical forces; as, chemosorption of gaseous nitrogen on iron catalysts. Syn. -- chemisorption. [ WordNet 1.5 ]
n. [ Chemical + synthesis. ] (Plant Physiol.) Synthesis of organic compounds by energy derived from chemical changes or reactions. Chemosynthesis of carbohydrates occurs in the nitrite bacteria through the oxidation of ammonia to nitrous acid, and in the nitrate bacteria through the conversion of nitrous into nitric acid. -- Chem`o*syn*thet"ic a. [Webster 1913 Suppl.]
n. the use of chemical agents to treat or control disease (or mental illness); -- also used especially in reference to the use of chemicals to treat cancer. [ WordNet 1.5 +PJC ]
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