quant-, quanti- (Latin: how much; as much as, how many; amount).quanta: 
The plural of quantum.
 
quantal: 
In science, used to describe something that at a given instant can be found in one of two possible states.
 
quantifier: 
A word such as "all", "some", or "most"; or a logical symbol with this meaning, that indicates the range of individuals or items referred to.
 
quantify: 
1. To determine the quantity of; to calculate or express the number, degree, or amount of something.  
2. To use a quantifier to limit the range of individuals or items referred to in a sentence or proposition. quantitate: 
To estimate or determine precisely the number, degree, or amount of something.
 
quantitative: 
1. Pertaining to quantity.  
2. Relating to, concerning, or based on the amount or number of something. 3. Capable of being measured or expressed in numerical terms. quantity: 
1. Greatness, amount; an amount or number of something.  
2. A large amount or number. quantum: 
1. Greatness, amount; a quantity or amount of anything.  
2. In physics, the smallest discrete quantity of a physical property, e.g., electromagnetic radiation or angular momentum. 3. The smallest unit used to measure a physical property. 4. Also, as an adjective, sudden, dramatic, and significant (a quantum leap, a sudden, dramatic, and significant change or advance).  |