What is another word for physical constant?
Pronunciation: [fˈɪzɪkə͡l kˈɒnstənt] (IPA) 
A physical constant is a fixed numerical value that does not change irrespective of the conditions it is being measured in. Some of the synonyms for physical constant include unvarying quantity, immutable value, and constant parameter. The unvarying quantity suggests that the numerical value of the constant stays the same across all measurements that are taken. Immutable value is another synonym that implies the value of the physical constant cannot be modified or altered under any circumstances. The term constant parameter on the other hand emphasizes that the physical constant is a fixed value that does not vary based on any external factors or conditions.
