tertiary

tertiary
[ˈtəːʃ(ə)ri]
adjective

third in order or level
第三的；第三位的；第三级的
most of the enterprises were of tertiary importance.
大部分企业属三级企业。
the tertiary stage of the disease.
疾病的第三阶段。
■(chiefly Brit.)relating to or denoting education at a level beyond that provided by schools, especially that provided by a college or university
(主英)（继初等、中等教育之后的）职业教育的；高等教育的，大学教育的
■relating to or denoting the medical treatment provided at a specialist institution
第三期治疗的
(Tertiary)(Geology)of, relating to, or denoting the first period of the Cenozoic era, between the Cretaceous and Quaternary periods, and comprising the Palaeogene and Neogene sub-periods
(地质)第三纪（或系）的
(Chemistry)(of an organic compound) having its functional group located on a carbon atom which is itself bonded to three other carbon atoms
(化)叔的；特的
■(Chemistry)(chiefly of amines) derived from ammonia by replacement of three hydrogen atoms by organic groups
(化)（尤指胺）叔的；三代的

noun

(the Tertiary)(Geology)the Tertiary period or the system of rocks deposited during it
(地质)第三纪；第三系；第三纪岩
The Tertiary lasted from about 65 to 1.6 million years ago. The mammals diversified following the demise of the dinosaurs and became dominant, as did the flowering plants
a lay associate of certain Christian monastic organizations
第三修道会会员（某些基督教组织做杂务的会支）
a Franciscan tertiary.
方济各会的会员。

语源

mid 16th cent. (in sense 2 of the noun): from Latin tertiarius 'of the third part or rank', from tertius 'third'

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