The term "density insoluble" is not a standard scientific term. Density itself is a property of matter, and it doesn't make sense to talk about it being "insoluble."

Here's a breakdown of what's likely being confused:

* Density: Density is a measure of how much mass is contained within a given volume. It's calculated by dividing the mass of an object by its volume (Density = Mass / Volume).

* Solubility: Solubility refers to the ability of one substance (solute) to dissolve in another substance (solvent).

What might be causing confusion?

* Density and Buoyancy: Substances with a higher density than water will sink, while substances with a lower density will float. This might lead someone to incorrectly associate density with solubility.

* Insoluble substances and density: While insoluble substances might have a higher density than water, it's important to understand that density itself doesn't determine solubility. For example, sand is insoluble in water, but it has a higher density than water.

* Misunderstanding of the terms: It's possible that the person using the term "density insoluble" is simply confused about the meanings of density and solubility.

To clarify, the concept of density and solubility are separate concepts.

Let me know if you have any more questions about density or solubility!