<p><strong>Abbreviation:</strong></p><ul><li>DDT</li><li>Definition:<ul><li>A potent synthetic insecticide, C₁₄H₉Cl₅, initially developed in the 1940s to combat insect-borne human diseases.</li><li>Found to be highly and adversely persistent in the environment; agricultural use now prohibited in many countries, including the United States since 1972.</li></ul></li></ul>