লক্ষ্য করুন: এই এন্ট্রির অনুবাদ বর্তমানে মান পর্যালোচনার অধীনে রয়েছে, তাই কিছু বিষয়বস্তু সাময়িকভাবে শুধুমাত্র ইংরেজিতে প্রদর্শিত হচ্ছে।
এই এন্ট্রিটি এখনও আপনার ভাষায় অনুবাদ করা হয়নি, তাই নিচে মূল লেখাটি দেখানো হচ্ছে।
subhedral
This term is a specialized technical descriptor used almost exclusively in mineralogy and petrology to describe the degree of crystal perfection. It occupies a precise middle ground in a three-part classification system: euhedral (perfectly formed), subhedral (partially formed), and anhedral (no crystal faces).
Because it is a descriptive scientific adjective, it is used in a neutral, objective register. It typically modifies nouns like crystals, grains, or phenocrysts to provide a precise visual description of how a mineral grew within its surrounding environment, often indicating limited space or interference during crystallization.
Meanings
Examples
The thin section reveals several subhedral quartz grains embedded in the matrix.
These crystals are subhedral because they lack a few of their primary faces.
Look at this sample, the feldspar is clearly subhedral.
I wonder if the cooling rate caused these grains to remain subhedral.
The mineral exhibits a subhedral habit, indicating limited space for growth.
The rock consists of a mixture of anhedral and subhedral plagioclase.
The subhedral nature of the phenocrysts suggests a complex crystallization history.