(n) a tranquilizer (trade name Valium) used to relieve anxiety and relax muscles; acts by enhancing the inhibitory actions of the neurotransmitter GABA; can also be used as an anticonvulsant drug in cases of nerve agent poisoning, Syn.Valium
(n) Portuguese explorer who in 1488 was the first European to get round the Cape of Good Hope (thus establishing a sea route from the Atlantic to Asia) (1450-1500), Syn.Diaz, Bartholomeu Dias, Bartholomeu Diaz
The Collaborative International Dictionary of English (GCIDE) v.0.53
{ } a. [ Gr. &unr_; disjunctive, fr. &unr_; to disjoin; dia` through, asunder + &unr_; to join, yoke. ] (Anc. Mus.) Disjoining two fourths; as, the diazeutic tone, which, like that from F to G in modern music, lay between two fourths, and, being joined to either, made a fifth. [ Obs. ] [ 1913 Webster ]
[ Pref. di- + azo- ] (Chem.) A combining form (also used adjectively), meaning pertaining to, or derived from, a series of compounds containing a radical of two nitrogen atoms, united usually to an aromatic radical; as, diazo-benzene, C6H5.N2.OH. [ 1913 Webster ]
☞ Diazo compounds are in general unstable, but are of great importance in recent organic chemistry. They are obtained by a partial reduction of the salts of certain amido compounds. [ 1913 Webster ]
Diazo reactions (Chem.), a series of reactions whereby diazo compounds are employed in substitution. These reactions are of great importance in organic chemistry. [ 1913 Webster ]
v. t. (Chem.) To subject to such reactions or processes that diazo compounds, or their derivatives, shall be produced by chemical exchange or substitution. [ 1913 Webster ]
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