from The Century Dictionary.
- noun A colorless compound, prepared from aminophenyltetrazole-carboxylic acid. It has acidic properties, crystallizes in lustrous prisms or plates, melts at 155° C., and may be sublimed.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Org. Chem.) A crystalline acid substance, CH2N4, which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry A five-membered
heterocyclehaving one carbonatom, four nitrogenatoms and two double bonds
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