Sentence:  The Bishop, wearing a gleaming cape of green and gold, raised his hand over the plough and the kneeling farmers: "God speed the plough: the beam and the mouldboard, the <WSD>slade</WSD> and the sidecap, the share and the coulters...in fair weather and foul, in success and disappointment, in rain and wind, or in frost and sunshine. God speed the plough." 
Meaning of the word marked with <WSD> tags:  The sole of a plough.