laevorotatory or levorotatory /lē-vō-rōˈtə-tə-ri or -rō-tāˈ/

1. Counter-clockwise
2. Rotating the plane of polarization of light to the left (optics)

laevorotāˈtion noun

• lower-deck
• lower decks
• lowered
• lower grade
• lower grades
• lower house
• lower houses
• lowerier
• loweriest
• lowering
• loweringly
• lowerings
• lower mordent
• lowermost
• lower one's sights
• Lower Palaeozoic
• lower regions
• lowers
• lower the flag
• lowery
• lowes
• lowest
• lowest common denominator
• lowest common multiple
• low-fat