Glossary N
Glossary N
Natural killer (NK) cell is defined as a type of lymphocyte that attacks invading organisms; type of leukocyte that destroys certain kinds of tumor cells and cells infected with viruses Natural killer cells are cells that circulate in the body, playing a role in different immune responses and especially in destroying diseased cells by injecting them with toxic chemicals. .
- Natural language categories : Natural language categories are language terms that include a wide range of exemplars; most natural language categories are hierarchical in nature, as in animal; canine; dog
Natural partitions hypothesis refers tothe notion that the world makes obvious the things that take nouns as labels, that is, that the meanings that nouns encode are natural chunks of meaning. That makes the task of learning nouns one in which the child must simply find the label - the meaning is provided outside of language. Compare Relational relativity hypothesis.
Natural reinforcers are reinforcers that are naturally provided for a certain behavior; that is, they are a typical consequence of the behavior within that setting.