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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Methenyl \Meth"e*nyl\, noun [Methene + -yl.] (Chem.) The hypothetical hydrocarbon radical {CH}, regarded as an essential residue of certain organic compounds.
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Tetrazole \Tet*raz"ole\, noun [Tetrazo- + -ole.] (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. [Webster 1913 Suppl.]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Tetrazine \Tet*raz"ine\, noun Also -in \-in\ . [Tetrazo- + -ine.] (Chem.) A hypothetical compound, {C2H2N4} which may be regarded as benzene with four {CH} groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties. [Webster 1913 Suppl.]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Azole \Az"ole\, noun [From {Azote}.] (Org. Chem.) Any of a large class of compounds characterized by a five-membered ring which contains an atom of nitrogen and at least one other noncarbon atom (nitrogen, oxygen, sulphur). The prefixes furo-, thio, and pyrro- are used to distinguish three subclasses of azoles, which may be regarded as derived respectively from furfuran, thiophene, and pyrrol by replacement of the {CH} group by nitrogen; as, furo-monazole. Names exactly analogous to those for the azines are also used; as, oxazole, diazole, etc. [Webster 1913 Suppl.]
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Definitions retrieved from the Open Source DICT Webster's English and WordNet 3.0 dictionaries. Click here for database copyright information.
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