Help Wordnik hunt for a million missing words by backing our Kickstarter!


from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A five-membered heterocycle containing three carbon atoms, two adjacent nitrogen atoms and one double bond

from The Century Dictionary and Cyclopedia

  • n. A basic liquid, , made by the action of acrolein on hydrazine in ethereal solution. It boils at 144° C.


Sorry, no etymologies found.


Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.