It sounds like the clink of a penny dropping into a collecting tin.
This is appropriate, as a tincture is a small amount, though it's not usually anything to do with money.
A tincture can be one of the colours on a heraldic shield (when I say colours I include white and yellow, even though strictly speaking in heraldry these aren't colours at all but metals).
This is the coat of arms of Peru.
A tincture can also be medicine mixed with alcohol (or, for British posh old people, the same thing but without the medicine). A tincture can mean a slight flavour, a mild scent, an almost invisible trace, or a slight colouring.
It can be a small amount of something intangible, too, like a hint of contempt in an eye or a tinge of doubt in a voice.
A tincture started off meaning dye or a pigment, but this meaning has now faded away like the pattern on an ancient carpet to leave hardly a trace of its existence behind.
Word To Use Today: tincture. This word comes from the Latin tinctura, dyeing, from tingere to dye or colour.
from Ed @ Lexicolatry:
You're absolutely right, Sally - tincture does sound exactly like a penny dropping into a metal bin. What a brilliant description.
I'm neither British nor posh, but I do rather like that meaning! :)
Thanks, Ed and Jingles. Sorry about the technical blip that caused this post to do its Cheshire cat trick. If I knew what I'd done the first time I'd make sure I didn't do it again.