Each conker is 2-4 cm diameter, glossy nut-brown with a whitish scar at the base.
From the en.wikipedia.org
Conker, Sunday 24 October, 2004A selection of fresh conkers from a Horse-chestnut.
From the en.wikipedia.org
Katarzyna Dziekan sent us this lovely picture of a conker with a heart-shaped hilum.
From the telegraph.co.uk
I am growing two conker trees in my garden, both have been grown from local conkers.
From the guardian.co.uk
The game is played by two players, each with a conker threaded onto a piece of string.
From the thisisbristol.co.uk
One person dangles his conker while the other one hits it with his own.
From the time.com
Toby Spence's apprentice David, glossy as a shiny conker in voice and manner, was impeccable.
From the guardian.co.uk
Conker then comes to the grim realization that Berri is still dead.
From the en.wikipedia.org
My mind immediately shot back to fond memories of hours and hours spent conker picking as a child.
From the kidderminstershuttle.co.uk
More examples
Buckeye: the inedible nutlike seed of the horse chestnut
Conker's Bad Fur Day is a platform game developed and published by Rare, and distributed by Nintendo for the Nintendo 64. ...
Conkers or conker is a game traditionally played mostly by children in Britain, Ireland and some former British colonies using the seeds of horse-chestnut trees - the name conker is also applied to the seed and to the tree itself. ...
A horse-chestnut used in the game of conkers
N. 1. Horse chestnut. 2. (~s) Game played by children. To play this game, one first drills a small hole through the middle of a conker, and threads a string through this hole. ...