A type of electronic device that utilizes thermionic emission for the production of electrical current.

थर्मायोनिक संयंत्र

English Usage: The thermionic plant was crucial in the development of early radio technology.

Hindi Usage: थर्मायोनिक संयंत्र प्रारंभिक रेडियो तकनीक के विकास में महत्वपूर्ण था।