| Name: | olfactory placode |
|---|---|
| Synonyms: | olfactory placodes |
| Definition: | Neurogenic placode that gives rise to the olfactory neurons that which convey odor information to the CNS. |
| Ontology: | Anatomy Ontology [ZFA:0000048] |
| Name: | pioneer neuron |
|---|---|
| Synonyms: | |
| Definition: | Pioneer neurons establish a pathway in the developing central nervous system and then undergo programmed cell death once the adult axons, which follow them, have made connections with the target site. Thus, they are a transient cell type involved in axon guidance. |
| Ontology: | Anatomy Ontology [ZFA:0009066] |
| Name: | absent |
|---|---|
| Synonyms: | absence, absent from organism |
| Definition: | A quality denoting the lack of an entity. |
| Ontology: | Phenotypic Quality Ontology [PATO:0000462] |