There are multiple definitions:
radioimmunoassay(English)
- Abbreviation may be used in Am. Soc. Physiol. journals without definition.
- Physiology
Reamer/Irrigator/Aspirator(English)
- has value as an autologous bone-graft harvesting device
- mRNA
- Hematology
- https://doi.org…06/JBJS.L.00159