noun
Archaic term for dice, literally 'one heaven, six earth', referring to the one and six pips on a die. Not used in everyday speech; modern Japanese uses サイコロ.
「一天地六」は、サイコロの古い呼び名の一つだ。
'Ittenchiroku' is one of the old names for dice.
Standard modern word for dice; 一天地六 is an archaic, literary synonym.
From the Chinese-derived reading of 一 (one), 天 (heaven), 地 (earth), 六 (six), referring to the one-spot and six-spot on a die. The exact historical derivation is uncertain.