Sentence:  The coronary arteries were sclerotic and diffusely narrowed throughout their courses , and the right coronary artery was virtually occluded by a yellow atheromatous plaque 1.5 cm. <WSD>distal</WSD> to its origin . 
Meaning of the word marked with <WSD> tags:  situated farthest from point of attachment or origin, as of a limb or bone