noun
ox; bullock
Refers specifically to a castrated male bovine, typically used for draft or meat. In agricultural contexts, 去勢牛 is the standard term.
この農場では去勢牛を飼育している。
This farm raises oxen.
牛 is the broad term for cattle/cow, not specifying sex or castration status.
Compound of 去勢 (castration) and 牛 (cattle). The reading is the standard on'yomi for each kanji.