Final answer:
Ardor is a noun meaning enthusiasm or passion, and it does not refer to a bird, instrument, or mineral.
Step-by-step explanation:
The word ardor is a noun and its meaning is enthusiasm or passion. It is not a type of bird, a scientific instrument, or a rare mineral. The word refers to the strong, intense feeling of excitement or fervor toward an activity, cause, or concept. For example, one might say that an Olympic athlete competes with great ardor, demonstrating their zeal and commitment to their sport.