| 释义 |
xenobiotic
xen·o·bi·ot·ic X0003550 (zĕn′ə-bī-ŏt′ĭk, zē′nə-)adj. Not a natural component of a particular organism or biological system. Used of chemical compounds.n. A xenobiotic chemical, such as a pesticide.xenobiotic (ˌzɛnəʊbaɪˈɒtɪk) n (Chemistry) a chemical foreign to or not produced by an organismadj (Chemistry) pertaining to a chemical compound foreign to or not produced by an organismxen•o•bi•ot•ic (ˌzɛn ə baɪˈɒt ɪk, -bi-, ˌzi nə-)
n. a chemical or substance that is foreign to an organism or biological system. [1915–20] xenobiotic
xenobiotic[‚zēn·ə·bī′äd·ik] (biochemistry) A chemical that is not normally found in the body, such as a drug. xenobiotic
xenobiotic [ze″no-bi-ot´ik] a chemical compound foreign to a given biological system. With respect to animals and humans, xenobiotics include drugs, drug metabolites, and environmental compounds such as pollutants that are not produced by the body. In the environment, xenobiotics include synthetic pesticides, herbicides, and industrial pollutants that would not be found in nature.xen·o·bi·ot·ic (zen'ō-bī-ot'ik), 1. A pharmacologically, endocrinologically, or toxicologically active substance not endogenously produced and therefore foreign to an organism. 2. Pertaining to association of two animal species, usually insects, in the absence of a dependency relationship, as opposed to parasitism. [xeno- + G. bios, life + -ic] xenobiotic (zĕn′ə-bī-ŏt′ĭk, zē′nə-)adj. Not a natural component of a particular organism or biological system. Used of chemical compounds.n. A xenobiotic chemical, such as a pesticide.xen·o·bi·ot·ic (zen'ō-bī-ot'ik) A pharmacologically, endocrinologically, or toxicologically active substance not endogenously produced and therefore foreign to an organism. [xeno- + G. bios, life + -ic]xenobiotic a chemically synthesized compound that is found in the natural environment, but that does not normally occur in nature. Examples include pesticides, dyes, industrial pollutants. Such compounds may be structurally related to natural compounds and may be degraded slowly by the ENZYMES that degrade the natural counterparts. Others may be structurally unrelated to any known natural compound and their degradation occurs very slowly if at all. Xenobiotics generally persist in environments where microorganisms capable of their degradation do not naturally occur.xen·o·bi·ot·ic (zen'ō-bī-ot'ik) Pharmacologically, endocrinologically, or toxicologically active substance not endogenously produced and therefore foreign to an organism. [xeno- + G. bios, life + -ic] |