Quote Originally Posted by funfubarman
what is a tincture
From Wikipedia -

In medicine, a tincture is an alcoholic extract (e.g. of an herb) or solution of a nonvolatile substance (e.g. of iodine, mercurochrome.) Solutions of volatile substances were called spirits, although that name was also given to several other materials obtained by distillation, even when they did not include alcohol.

So it's an extract, basically. That's usually concentrated.