| class | strictly parasitic protozoans that are usually immobile |
|---|---|
| class | the organization of classes within a society |
| class | conflict between social or economic classes (especially between the capitalist and proletariat classes) |
| class | small class of minute arthropods |
| class | in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needle-like piercing organs connected with the pharynx |
| class | yews: in some systems classified as a class (Taxopsida) and in others as a subdivision (Taxophytina) used in some classifications for one of five subdivisions of Gymnospermophyta |
| class | ctenophores have retractile tentacles |
| class | small class of free-swimming tunicates |
| class | category used in some systems to comprise the two orders Ustilaginales (smuts) and Uredinales (rusts) |
| class | parasitic flatworms (including flukes) |
| class | free-living flatworms |
| class | alternative name for the class Chlorophyceae in some classifications |