| CER | aquatic fern of tropical America often used in aquariums |
|---|---|
| CER | pantropical aquatic fern |
| CER | primitive medium-sized theropod |
| CER | primitive medium-sized theropod |
| CER | fungi having carbonous perithecia with long necks |
| CER | genus of fungi forming continuous hyaline spores |
| CER | fungus causing Dutch elm disease |
| CER | African genus |
| CER | large light-gray African rhinoceros having two horns |
| CER | a small cycad of the genus Ceratozamia having a short scaly woody trunk and fernlike foliage and woody cones |
| CER | (Greek mythology) 3-headed dog guarding the entrance to Hades |
| CER | tadpole-shaped parasitic larva of a trematode worm |