noun
Standard word for dice used in games and gambling.
サイコロを振って、出た目で進むマスが決まる。
Roll the dice, and the number that comes up determines how many spaces you move.
すごろくをするに
You need dice to play sugoroku.
Rare kanji form; 賽 is not a jōyō kanji.
Rare kanji form; can also be read こっし with a different meaning.
The reading さいころ is thought to derive from 采 (さい, 'dice') + ころ (a suffix for small round objects). The kanji forms 賽子 and 骰子 are ateji.