1. subspecies that are differentiated by the markings on their wings. 2. To perceive or show the difference in or between; discriminate. 3. To make different by alteration or modification. 4. To calculate the derivative or differential of (a function). 5. To become distinct or specialized; acquire a different character. 6. To make distinctions; discriminate. 7. To undergo a progressive, developmental change to a more specialized form or function. Used especially of embryonic cells or tissues.
