Related Clues:

• Move very slowly
• Advance at a snail's pace
• Exhibit Darwinism
• Part of a foot?
• Word before "worm"
• Minimal distance
• Part of a yard
• Change with time
• "Hedwig and the Angry ___"
• 1/36 of a yard
• Change gradually
• TV screen-measuring unit
• What a big tick on a ruler indicates
• Increase in complexity, perhaps
• One twelfth of a foot