Rimula is a genus of fungi in the Helotiales order. The relationship of this taxon to other taxa within the order is unknown (incertae sedis), and it has not yet been placed with certainty into any family. ...[gastropod] Rimula is a genus of sea snails, marine gastropod mollusks in the family Fissurellidae, the keyhole limpets. The name of the genus is a diminutive of `rime`, a fissure. The shell is thin and cancellated, with a perforation near the anterior margin. Species within the genus Rimula include: ...
A minute slit or fissure. ... Origin: L. Dim. Of rima ... (05 Mar 2000) ... 
(rim´u-lә) a minute fissure, as of the spinal cord or brain.
Type: Term Pronunciation: rim′yū-lă Definitions: 1. A minute slit or fissure.
rimula 1. A minute slit or fissure; especially, of the spinal cord or brain. 2. A very small rima, usually used in reference to structures in the brain or spinal cord.