释义 |
Definition of crista in English: cristanounPlural cristae ˈkrɪstəˈkristə 1Anatomy Zoology A ridge or crest. 〔剖,动〕脊;羽冠 Example sentencesExamples - The medial edge of the maxilla supports a shelf or ridge, the crista choanalis, which Mendrez-Carroll suggested represented an early stage in the evolution of a bony secondary palate.
- The posterior lingual and buccal cristae do not meet the median longitudinal crista.
- Near the front of the brain, in the midline, a deep sagittal groove in the dura indicates the site where the crista galli of the ethmoid bone is accommodated.
- The falx is narrow and attached firmly to the crista galli of the ethmoid bone.
- The crista prootica is a ridge or ledge of the prootic which runs antero-posteriorly along the side of the braincase above the otic capsule.
2Biology Each of the partial partitions in a mitochondrion formed by infolding of the inner membrane. 〔生〕嵴 Example sentencesExamples - In the swollen mitochondria, the cristae system practically disappeared.
- The cytoplasm was full of elongated mitochondria, rich in cristae, and with pale matrix.
- Mitochondria showed an intact double membrane, with internal cristae.
- The inner mitochondrial membrane is folded into cristae that permeate the soluble, internal matrix.
- The mitochondria are conventional, with flattened cristae.
OriginMid 19th century: from Latin, 'tuft, plume, crest'. Definition of crista in US English: cristanounˈkristə 1Anatomy Zoology A ridge or crest. 〔剖,动〕脊;羽冠 Example sentencesExamples - The crista prootica is a ridge or ledge of the prootic which runs antero-posteriorly along the side of the braincase above the otic capsule.
- The medial edge of the maxilla supports a shelf or ridge, the crista choanalis, which Mendrez-Carroll suggested represented an early stage in the evolution of a bony secondary palate.
- The posterior lingual and buccal cristae do not meet the median longitudinal crista.
- Near the front of the brain, in the midline, a deep sagittal groove in the dura indicates the site where the crista galli of the ethmoid bone is accommodated.
- The falx is narrow and attached firmly to the crista galli of the ethmoid bone.
2Biology Each of the partial partitions in a mitochondrion formed by infolding of the inner membrane. 〔生〕嵴 Example sentencesExamples - The cytoplasm was full of elongated mitochondria, rich in cristae, and with pale matrix.
- In the swollen mitochondria, the cristae system practically disappeared.
- The mitochondria are conventional, with flattened cristae.
- Mitochondria showed an intact double membrane, with internal cristae.
- The inner mitochondrial membrane is folded into cristae that permeate the soluble, internal matrix.
OriginMid 19th century: from Latin, ‘tuft, plume, crest’. |