| R | a horse bred for racing |
|---|---|
| R | usually elongate cluster of flowers along the main stem in which the flowers at the base open first |
| R | the optically inactive form of tartaric acid that is often found in grape juice |
| R | (botany) having stalked flowers along an elongated stem that continue to open in succession from below as the stem continues to grow |
| R | slender fast-moving North American snakes |
| R | an animal that races |
| R | a fast car that competes in races |
| R | someone who drives racing cars at high speeds |
| R | very swift lizard of eastern and central United States |
| R | a course over which races are run |
| R | a course over which races are run |
| R | a canal for a current of water |