The subcosta is a specific vein in the wings of insects, located near the costa.

उपकर्ण

English Usage: The entomologist studied the subcosta of the dragonfly's wing to understand its flight patterns.

Hindi Usage: कीटविज्ञानी ने ड्रैगनफ्लाई के पंख के उपकर्ण का अध्ययन किया ताकि इसके उड़ने के पैटर्न को समझ सकें।