"Least abundant" means having the smallest quantity or proportion compared to other things in a particular set or group. It indicates that something is scarce or rare relative to others.

Here's a breakdown:

* Least: The smallest amount or the lowest number.

* Abundant: Existing in large quantities or numbers.

Example:

In a bag of marbles, there are 10 blue marbles, 5 red marbles, and 1 green marble. The green marble is the least abundant because there is only one of them.

Other ways to say "least abundant":

* Scarcest

* Rarest

* Fewest

* Smallest in number

* Lowest in quantity

Let me know if you have any other questions!