The active principle characterizes matter, and gives it its quality.

As to the relation between the active and the passive principles there was no real difference.

The latter is the active principle after being released from the polymer.

Qi, in traditional Chinese culture, is an active principle forming part of any living thing.

Prayer puts into force an active principle of doing.

Either Jefferson was a fool in his zealotry or an active principle of evil.

In only very few instances is chaos an evil power, an active principle.

A chemical or synthetic drug may contain a single, therefore an unbalanced, but very powerful active principle.

Only a few investigations have considered the question whether the active principles of ololiuhqui could find a useful application in medicine.

The individual active principles allow different processing speed for acquiring the information.