biochemical

adj

1. (not-comparable)of, or relating to biochemistry
2. (not-comparable)characterized by, produced by, or involving chemical processes in living organisms

   “In view of this biochemical diversity, the possibilities of interspecies hybridization in this genus are very interesting and worthy of attention.”

noun

1. A chemical substance derived from a biological source.

   “Dr. Gwaltney sent nasal secretions from 40 volunteers with colds to Dr. Proud and Dr. Naclerio, who tested the secretions for the presence of these biochemicals.”