| CLAS | ctenophores lacking tentacles |
|---|---|
| CLAS | earthworms |
| CLAS | enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions |
| CLAS | nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores |
| CLAS | brittle stars and basket stars |
| CLAS | a class of fish having a skeleton composed of bone in addition to cartilage |
| CLAS | an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs |
| CLAS | oysters |
| CLAS | a regularly scheduled session as part of a course of study |
| CLAS | brown algae |
| CLAS | one of two subgroups of Nematoda used in some classification systems |
| CLAS | most conifers: in some systems classified as a class (Pinopsida) and in others as a subdivision (Pinophytina) |