Name: | fourth ventricle |
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Synonyms: | 4th ventricle, hindbrain ventricle, rhombencephalic ventricle, rhombencephalic vesicle, ventricle IV, ventriculus rhombencephali |
Definition: | Fluid-filled brain cavity. Most posterior brain ventricle. |
Ontology: | Anatomy Ontology [ZFA:0000110] |
Name: | composition |
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Synonyms: | composed of, compositionality, content, structure, composition |
Definition: | A single physical entity inhering in an bearer by virtue of the bearer's quantities or relative ratios of subparts. |
Ontology: | Phenotypic Quality Ontology [PATO:0000025] |