A "prime quantity" refers to a number that is only divisible by one and itself. While this term is often used in mathematics and science, there are many synonyms that can be used to describe the same concept. Some of these synonyms include "prime number," "irreducible number," "unsplittable number," "indivisible number," and "primary number." Each of these terms highlights the idea that a prime quantity cannot be broken down into smaller factors. Understanding these synonyms can help clarify concepts in math and science, and make it easier to communicate complex ideas to others.