PACER • E-FREE TRANSLATION.COM • Definition of Pacer

... obstacle—the little hill at which the sorrel horse had balked. Lo! rested and full of grain, he balked again! He ruined our start. He spoiled the teams. Lee had more patience than I would have had. He unhitched the lead team and in place of the sorrel put a saddle horse called Pacer. Then Doyle tried again and surmounted the hill. Our saddle horses slowly worked ahead over as rocky and rough a road as I ever traveled. Most of the time we could see over the rim down into the basin. Along here the rim appeared to wave in gentle swells, heavily timbered and thickly rock-strewn, ...

— Tales of lonely trails • Zane Grey

... They were two big mouse-colored grayhounds, with tails like rats and protruding ribs. They were named "Racer" and "Pacer," and were warranted by their late owner to out-distance any rabbit that ever drew breath. The girl felt that an event as important as a coursing should be the occasion of a gathering of the neighboring ranchers; but ...

— Ben Blair - The Story of a Plainsman • Will Lillibridge