ra·di·o·im·mu·no·as·say 
(rā′dē-ō-ĭm′yə-nō-ăsā, -ĭm-y′-)
(rā′dē-ō-ĭm′yə-nō-ăsā, -ĭm-y′-)n. Abbr. RIA
A technique used to quantitate minute amounts of a substance, such as a hormone, in blood or another liquid. It involves the use of radioisotopes and of antibodies to the substance being investigated.
- prophasic
- prophecy
- prophesier
- prophesize
- prophesy
- prophet
- prophetess
- prophethood
- prophetic
- prophetical
- prophetically
- propheticalness
- prophylactic
- prophylactically
- prophylaxis
- propinquity
- propiomazine
- propionaldehyde
- propionate
- propionic acid
- propitiable
- propitiate
- propitiation
- propitiative
- propitiator