| extinction | (noun) the act of extinguishing; causing to stop burning | Synonyms: extinguishing, quenching |
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| (noun) a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus | Synonyms: experimental extinction |
| (noun) complete annihilation | Synonyms: extermination |
| (noun) the reduction of the intensity of radiation as a consequence of absorption and radiation | - |
| (noun) no longer in existence | Synonyms: defunctness |
| (noun) no longer active; extinguished | - |
| extinguisher | (noun) a manually operated device for extinguishing small fires | Synonyms: asphyxiator, fire extinguisher |
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| extinguishing | (noun) the act of extinguishing; causing to stop burning | Synonyms: extinction, quenching |
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| extirpation | (noun) surgical removal of a body part or tissue | Synonyms: ablation, cutting out, excision |
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| (noun) the act of pulling up or out; uprooting; cutting off from existence | Synonyms: deracination, excision |
| extirpator | (noun) a farm implement used to remove weeds. | - |
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| sextillion | (noun) the number that is represented as a one followed by 21 zeros | - |
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| sexting | (noun) sending sexual messages using a mobile phone or computer | - |
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| textile | (noun) artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers | Synonyms: cloth, fabric, material |
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| texting | (noun) the act of sending messages via SMS | - |
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