DNA stands for Deoxyribonucleic Acid. It is a molecule that contains the genetic instructions for the development and function of all living organisms.

Here's what it means:

* Deoxyribo: This refers to the sugar molecule (deoxyribose) that is a part of the DNA structure.

* Nucleic: This indicates that it's a type of acid found in the nucleus of cells.

* Acid: This refers to the acidic nature of the molecule.

Essentially, DNA is like a blueprint or a code that holds all the information about an organism, from its physical characteristics to its biological processes.