一切經音義 79.206

79.206

槎上（柴霞反水浮大木株曰浮槎古今正字從木差聲差音又）。

Cháshàng 槎上 (fanqie ch- + x- [chái xiá]; large tree trunks floating on water are called fúchá; the Gujin zhengzi analyzes it as having radical 'wood' (木) and phonetic chā (差); chā is pronounced yòu).