also: おいちょう
noun
In the card game mekuri karuta, おいちょ refers to the card value eight. Possibly derived from Portuguese 'oito'.
おいちょを引いたら勝ちだ。
If you draw an eight, you win.
noun
third-rank prostitute (historical Kyoto)
Only with reading おいちょう
Archaic term for a third-rank prostitute in the Kyoto red-light districts, used with the reading おいちょう.
江戸時代の京都では、おいちょうは遊女の階級の一つだった。
In Edo-period Kyoto, oichō was one of the ranks of courtesans.
Sense 1 is possibly from Portuguese 'oito' (eight). Sense 2 is of uncertain origin, likely a historical term specific to the Kyoto pleasure quarters.