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Wikipedia. Wikipedia is a tertiary source. Because Wikipedia is easily editable by anyone, it is generally not considered to be a reliable source for academic citation. Nevertheless, content on Wikipedia is generally accurate. Wikipedia often proves useful for finding primary and secondary sources. See also. Source text; Third-party source
The tertiary sector of the economy, generally known as the service sector, is the third of the three economic sectors in the three-sector model (also known as the economic cycle). The others are the primary sector ( raw materials) and the secondary sector ( manufacturing ).
Tertiary is an obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start of the Cenozoic Era, and extended to the beginning of the Quaternary glaciation at the end of the Pliocene Epoch.
Tertiary. The Tertiary was an official geological period, but it is no longer used. It included the first part of the Cainozoic. This is now divided into the Palaeogene and the Neogene . The previous use of the term "Tertiary" explains why the last period of the Cainozoic is called the Quarternary. There was a big debate about that.
Definition of tertiary adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Tertiary - New World Encyclopedia. The Tertiary period was once prominent as a major division of the geologic timescale, designating the time from the end of the Cretaceous period about 65 million years ago to the start of the Quaternary period about 1.6 million years ago.
A tertiary source (also called thirdhand [1]) is an index or a summary of primary and secondary sources. [2] . In research, tertiary sources are used as a guide to help find primary and secondary sources of information. [3] . Tertiary sources are very useful to find search terms for online literary searches. [4] .
