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.
Captain America is a fictional superhero, created by Joe Simon and Jack Kirby, who first appeared in Timely Comics ' Captain America Comics #1 (December 1940) . He is typically an icon of liberty and patriotism, but favors freedom over blind loyalty. Captain America is not here to lead the country. 2  I'm here to serve it. 3  If I'm a captain, then I'm a soldier. 4  Not of any military branch, but of the American people.