| 释义 |
Definition of raphide in English: raphidenoun ˈreɪfʌɪdˈrāfīd Botany A needle-shaped crystal of calcium oxalate occurring in clusters within the tissues of certain plants. Example sentencesExamples - Occasionally, calcium oxalate raphide or druse crystals were observed in this tissue.
- In monocots, calcium oxalate is most often laid down and usually as bundles of needle-shaped crystals known as raphides.
- The raphides project into the anther locule.
- The callus consists largely of parenchyma with raphides and is supplied by eight to ten collateral bundles.
- Some of the latter are idioblastic and enclose raphides, whereas others are larger and form cavities containing mucilage.
Origin Mid 19th century: via French from Greek rhaphis, rhaphid- 'needle'. Definition of raphide in US English: raphidenounˈrāfīd Botany A needle-shaped crystal of calcium oxalate occurring in clusters within the tissues of certain plants. Example sentencesExamples - The callus consists largely of parenchyma with raphides and is supplied by eight to ten collateral bundles.
- Some of the latter are idioblastic and enclose raphides, whereas others are larger and form cavities containing mucilage.
- Occasionally, calcium oxalate raphide or druse crystals were observed in this tissue.
- In monocots, calcium oxalate is most often laid down and usually as bundles of needle-shaped crystals known as raphides.
- The raphides project into the anther locule.
Origin Mid 19th century: via French from Greek rhaphis, rhaphid- ‘needle’. |