noun which may take the genitive case particle 'no', noun
drought resistance; xerophilous
Technical term used in botany, agriculture, and materials science to describe the ability to withstand dry conditions. Often used attributively with の.
この植物は耐乾性が高いので、水やりが少なくて済む。
This plant has high drought resistance, so it needs little watering.
耐乾性
Research is underway to develop drought-resistant crops.
乾燥耐性 is a near-synonym also meaning desiccation tolerance, but 耐乾性 is more compact and common in compound terms.
Compound of 耐 (resistant) + 乾 (dry) + 性 (property/nature). A modern technical coinage following the pattern of terms like 耐熱性 (heat resistance).