research association; research society / group of enthusiasts (as may be found in schools, colleges, etc)

research & development; R&D

(education) research project, done by Japanese schoolchildren during summer break, to be presented upon return to school

recitation; chanting / noh chanting; a noh song

to sing / to compose poetry / to recite poetry / to tweet, said of birds

(grammar) active voice

Kyūjitai form of 半導体: semiconductor

(physics) a semiconductor

response; reception; treatment; dealing with; handling

(neuroanatomy) amygdala