Wiktionary英语词典
收录 1,329,381 个英语单词，来自Wiktionary的英文释义、IPA发音、词源、词形变化和词汇关系数据
Q开头单词
(共7,126个)
plural of quaternarist
A verse having four metrical feet.
Any reaction in which a tertiary amine is converted to a quaternary ammonium compound
plural of quaternarization
quaternary
英 /kwəˈtɜː.nə.ɹi/|/ˈkwɔːt.ən.(ə.)ɹi/
Of fourth rank or order.
An ammonium group in which each hydrogen has been replaced by an alkyl or aryl group
An amine derivative, containing four radicals, of general formula R₁R₂R₃R₄-N⁺X⁻; the radicals may be...
plural of quaternary ammonium compound
Highly specialized healthcare treatments, such as experimental medicine and uncommon surgical proced...
A cation consisting of a central positively-charged nitrogen atom with four substituents, especially...
plural of quaternary compound
Synonym of quaternary care.
The sector of industry that involves the intellectual services: research, development, and informati...
Synonym of quarter moon.
The number ten.
The economic sector based on human knowledge which involves technology, information, planning, resea...
Alternative form of quaternary industry.
plural of quaternary sector of the economy
The arrangement of multiple folded or coiled proteins to form a multi-subunit complex.
plural of quaternary structure