Step 1: Understanding the Concept:
Certain spices have acquired prominent traditional and historical titles based on their geographical origin, color, and cultural significance.
Step 2: Detailed Explanation:
Turmeric (*Curcuma longa*) is traditionally referred to as the "Spice of Orient" or "Yellow Gold" due to its rich golden-yellow color and extensive history of use in Asian (Oriental) culinary, religious, and Ayurvedic medicinal practices.
Note: Black pepper is known as the "King of Spices" and Cardamom is known as the "Queen of Spices".
Step 3: Final Answer:
The spice of orient is Turmeric, which corresponds to option (D).