undetectable

It is a transformation that is undetectable to anyone not paying close attention.

Viral load can be reduced to undetectable levels, but it never goes away.

And if we are going to have to live with our past and current racism, then we must strive for undetectable levels of infection.

For example, the Army wants an undetectable aiming laser for small arms.

When the Undetectable Firearms Act passed in 1988, gun manufacturers had begun using lightweight polymer in handguns.

And we turn out an olive-oil that is just simply perfect—undetectable!

Things undetectable under normal conditions can be seen or heard distinctly when life depends on the intelligence so gained.

Instances of stones that have been thrown, or that have fallen, upon a small area, from an unseen and undetectable source.

He'd broken through the screen of guard ships in undetectable overdrive.

Monday morning Tom buckled down seriously to the job of designing an undetectable sub.