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  2. Ordinal numeral - Wikipedia

    en.wikipedia.org/wiki/Ordinal_numeral

    The first two in the sequence are by far the most common; 'tertiary' appears occasionally, and higher numbers are rare except in specialized contexts ('quaternary period'). The Greek series proto- , deutero- , trito- , ... is only found in prefixes, generally scholarly and technical coinages, e.g. protagonist, deuteragonist, tritagonist ...

  3. Tertiary - Wikipedia

    en.wikipedia.org/wiki/Tertiary

    Tertiary (/ ˈ t ɜːr. ʃ ə. r i, ˈ t ɜː r. ʃ i ˌ ɛr. i / TUR-shə-ree, TUR-shee-err-ee) [1] is an obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the extinction 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 ...

  4. Tertiary (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Tertiary_(chemistry)

    Tertiary is a term used in organic chemistry to classify various types of compounds (e. g. alcohols, alkyl halides, amines) or reactive intermediates (e. g. alkyl radicals, carbocations). Red highlighted central atoms in various groups of chemical compounds.

  5. Tertiary (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Tertiary_(disambiguation)

    The Tertiary is a geologic period. Tertiary (from Latin, meaning 'third' or 'of the third degree/order..') may also refer to: Tertiary (chemistry), a term describing bonding patterns in organic chemistry; In biochemistry, the tertiary structure of a protein is its overall shape, also known as its fold; Tertiary consumer, in ecology

  6. tert-Butyl alcohol - Wikipedia

    en.wikipedia.org/wiki/Tert-Butyl_alcohol

    tert-Butyl alcohol is the simplest tertiary alcohol, with a formula of (CH 3) 3 COH (sometimes represented as t-BuOH). Its isomers are 1-butanol, isobutanol, and butan-2-ol. tert-Butyl alcohol is a colorless solid, which melts near room temperature and has a camphor-like odor. It is miscible with water, ethanol and diethyl ether.

  7. Consumer (food chain) - Wikipedia

    en.wikipedia.org/wiki/Consumer_(food_chain)

    Tertiary consumers, which are sometimes also known as apex predators, are hypercarnivorous or omnivorous animals usually at the top of food chains, capable of feeding on both secondary consumers and primary consumers. Tertiary consumers are usually the largest, strongest and most aggressive animal in the local environment.

  8. Tertiary referral hospital - Wikipedia

    en.wikipedia.org/wiki/Tertiary_referral_hospital

    A tertiary referral hospital (also called a tertiary hospital, tertiary referral center, tertiary care center, or tertiary center) is a hospital that provides tertiary care, [1] which is a level of health care obtained from specialists in a large hospital after referral from the providers of primary care and secondary care. [2]

  9. Tributylphosphine - Wikipedia

    en.wikipedia.org/wiki/Tributylphosphine

    Tributylphosphine is the organophosphorus compound with the chemical formula P(CH 2 CH 2 CH 2 CH 3) 3, often abbreviated as PBu 3.It is a tertiary phosphine.It is an oily liquid at room temperature, with a nauseating odor.