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WordNet-Online
Definitions from WordNet
Noun subclass prototheria has 1 sense
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Definitions from the WebSubclass PrototheriaDefinition: Subclass Prototheria refers to a group of mammals that lay eggs instead of giving birth to live young. It includes the platypus and echidnas. This group is considered unique and primitive compared to other mammals. Sense 1: In zoology, prototheria is a subclass that encompasses the order Monotremata, which includes monotremes - egg-laying mammals. Example sentence: The platypus and echidnas are classified under the subclass Prototheria, as they are rare examples of egg-laying mammals. Sense 2: Prototheria can also refer to the embryos of certain mammals at an early stage of development. Example sentence: The prototheria stage in the development of monotremes is distinct from other mammals, as it involves the formation of an egg before hatching. Related Products on Amazon: | ||||
subclass magnoliidae subclass malacostraca subclass metatheria subclass ophiurida subclass opisthobranchia subclass ostracoda subclass pantotheria subclass phytomastigina subclass prototheria subclass rhizopoda subclass rosidae subclass selachii subclass synapsida subclass teleostei subclass telosporidia subclass zoomastigina subclasses
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