棘足亚目：裸阿米巴亚纲(subclass Gymnamoebia)阿米巴目(order Amoebida)的阿米巴样原虫亚目，其特征为常有由宽而透明的叶状伪足伸出的稍显尖形、有时为丝状并常分叉的透明二级伪足；棘阿米巴(Acanthamoeba)为其代表属- Rivinus's ducts(canals),gland,incisure(for-amen, notch, segment)
- rivus
- riziform
- RKY
- R. L. L.
- R. M. A.
- R. M. L.
- R. M. P.
- R. M. T.
- Rn
- R. N.
- RNA
- RNA-directed DNA polymerase
- RNA directed RNA polymerase
- RNA nucleotidyltransferase
- RNA polymerase
- RNase
- R. O. A.
- roach
- roaring
- Robalate
- Robaxin
- Robbins
- robenidine hydrochloride
- Roberts