horse chestnut

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A deciduous tree, the bark or fruit of which contains coumarins, flavonoids, saponins, tannins; it is believed to be anti-inflammatory; it is administered as an extract or decoction for arthritis, haemorrhoids, varicose veins, and to stimulate circulation; it is used topically for muscle pain and cramps
Toxicity HCs are poisonous, and may be fatal in children

horse chest·nut

(hōrs chest'nŭt)
(Aesculus hippocastanum) The nuts from this tree, after preparation, are made into a liquid used for its purported value as a tonic and narcotic.
References in periodicals archive ?
Derk Steemers, Marketing Manager Northern Europe, ProGlove says: "We're excited about our relationship with Conker, given how complementary its product set is to ours.
Animal welfare and adoption charity Blue Cross says dogs have lost their lives as a result of swallowing or eating conkers.
It comes as the World Conker Championship said competitors have been forced to bring in conkers from Germany.
The horse chestnut trees are starting to drop and you're bound to find some great conkers in among the dead leaves.
I remember fondly collecting conkers many years ago with my dad and brother.
Should the education system care about children who want to be professional conker players, I say?
The winner is the person whose conker doesn't break.
Championship committee member Geeta Bannister said: "The conkers were so small last year but this year we are more optimistic.
They came into the firing line when some head teachers banned conkers from their playgrounds in case a child got injured and their school got the blame.