abax
词形变化
not attested
复数
释义与例句
n.
-
1.
An ancient counting board containing grooves in which counters were placed; a forerunner of the abacus.
Basic arithmetic could be done with an abax.
词源
From Ancient Greek ἄβαξ (ábax, “board covered with sand”). Doublet of abacus and abaque.
来源：wiktionary