<p><strong>Adjective:</strong></p><ul><li>Also biologic.</li><li>Relating to the science and application of biology: Ideal candidates will have appropriate training in both physical and biological chemistry.</li><li>Relating to or involving living matter: Liquid nitrogen is critical for preserving blood, tissue, and other biological specimens.</li><li>Relating to the living organisms of a region: We are hoping to manage the river valley so that we maintain and enhance the current level of biological diversity.</li><li>Related genetically, as a birth parent whose egg or sperm contributed to the DNA of a child: He met his biological father when he was 37. The Greenes have two biological sons and one adopted daughter.</li></ul><p><strong>Noun:</strong></p><ul><li>Usually biologicals.</li><li>Biologic (def 1).</li></ul>