Referring to the suborder of reptiles that includes snakes that are poisonous or venomous.

जहरिले सर्पों का उपआदेश

English Usage: Thanatophidia are often feared due to their venomous nature.

Hindi Usage: जहरिले सर्पों का उपआदेश अक्सर उनके विषैले स्वभाव के कारण डराया जाता है।