Definition of phenocryst in English:

phenocryst

noun ˈfɛnə(ʊ)krɪstˈfiːnə(ʊ)krɪstˈfinəˌkrɪst

Geology

A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass.
〔地质〕斑晶，显斑晶
Example sentencesExamples
- The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
- Rhyolite dykes, which are commonly porphyritic with phenocrysts of either plagioclase or quartz, are intruded by dykes of hornblende tonalite, and the gabbro is likewise intruded by tonalite dykes.
- Bulk tephra can include phenocrysts or xenocrysts, lithic fragments and other inclusions, the proportions of which may vary across the fallout area, making accurate correlation difficult.
- Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles.
- Pyroxene mineralogy evolves along two paths with near end-member hedenbergite phenocrysts in the groundmass and aegirine solid solution in miaroles.

Origin

Late 19th century: from French phénocryste, from Greek phainein 'to show' + krustallos 'crystal'.

Definition of phenocryst in US English:

phenocryst

nounˈfinəˌkrɪstˈfēnəˌkrist

Geology

A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass.
〔地质〕斑晶，显斑晶
Example sentencesExamples
- The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
- Bulk tephra can include phenocrysts or xenocrysts, lithic fragments and other inclusions, the proportions of which may vary across the fallout area, making accurate correlation difficult.
- Pyroxene mineralogy evolves along two paths with near end-member hedenbergite phenocrysts in the groundmass and aegirine solid solution in miaroles.
- Rhyolite dykes, which are commonly porphyritic with phenocrysts of either plagioclase or quartz, are intruded by dykes of hornblende tonalite, and the gabbro is likewise intruded by tonalite dykes.
- Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles.

Origin

Late 19th century: from French phénocryste, from Greek phainein ‘to show’ + krustallos ‘crystal’.

词汇	phenocryst
释义	Definition of phenocryst in English: phenocryst noun ˈfɛnə(ʊ)krɪstˈfiːnə(ʊ)krɪstˈfinəˌkrɪst Geology A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass. 〔地质〕斑晶，显斑晶 Example sentencesExamples The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon. Rhyolite dykes, which are commonly porphyritic with phenocrysts of either plagioclase or quartz, are intruded by dykes of hornblende tonalite, and the gabbro is likewise intruded by tonalite dykes. Bulk tephra can include phenocrysts or xenocrysts, lithic fragments and other inclusions, the proportions of which may vary across the fallout area, making accurate correlation difficult. Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles. Pyroxene mineralogy evolves along two paths with near end-member hedenbergite phenocrysts in the groundmass and aegirine solid solution in miaroles. Origin Late 19th century: from French phénocryste, from Greek phainein 'to show' + krustallos 'crystal'. Definition of phenocryst in US English: phenocryst nounˈfinəˌkrɪstˈfēnəˌkrist Geology A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass. 〔地质〕斑晶，显斑晶 Example sentencesExamples The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon. Bulk tephra can include phenocrysts or xenocrysts, lithic fragments and other inclusions, the proportions of which may vary across the fallout area, making accurate correlation difficult. Pyroxene mineralogy evolves along two paths with near end-member hedenbergite phenocrysts in the groundmass and aegirine solid solution in miaroles. Rhyolite dykes, which are commonly porphyritic with phenocrysts of either plagioclase or quartz, are intruded by dykes of hornblende tonalite, and the gabbro is likewise intruded by tonalite dykes. Orthoclase occurred as remnant phenocrysts in a groundmass of chloritic material resulting from alteration of iron-rich felsite cobbles. Origin Late 19th century: from French phénocryste, from Greek phainein ‘to show’ + krustallos ‘crystal’.
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