In many respects, the steroids also seem to fall within this class. This enormous generalization induced from structure determination studies led to the hypothesis that all of these molecules are made in the cell by a single route â that they are products of a common biogenetic pathway. In recent years, great progress has been made in mapping this pathway.
Captain definition, a person who is at the head of or in authority over others; chief; leader. See more.
1 Captain, the pilot designated as the Pilot-In-Command (PIC), and the highest-ranking member or members of a flight crew. 2  First Officer (FO, also called a co-pilot), another pilot who is not the pilot-in-command, and is normally seated to the right of the captain.