A type of ancient, tree-like plant that existed during the Carboniferous period.

प्राचीन, वृक्ष-नुमा पौधा जो कार्बनिफेरस युग के दौरान अस्तित्व में था।

English Usage: "The fossilized remains of calamitean plants were found in the coal deposits."

Hindi Usage: "कोयला भंडारों में कैलामिटियन पौधों के जीवाश्मयुक्त अवशेष मिले।"