| RA | very swift lizard of eastern and central United States |
|---|---|
| RA | a course over which races are run |
| RA | a course over which races are run |
| RA | a canal for a current of water |
| RA | (Old Testament) the second wife of Jacob and mother of Joseph and Benjamin |
| RA | United States biologist remembered for her opposition to the use of pesticides that were hazardous to wildlife (1907-1964) |
| RA | United States biologist remembered for her opposition to the use of pesticides that were hazardous to wildlife (1907-1964) |
| RA | mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction |
| RA | move by degrees in one direction only, as of toothed wheels |
| RA | the series of vertebrae forming the axis of the skeleton and protecting the spinal cord |
| RA | axis of a compound leaf or compound inflorescence |
| RA | a not uncommon congenital defect in which a vertebra is malformed |