secular tertiaries

See under tertiary ( def 5 ). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To secular-tertiaries
Word Origin & History

1656, "of the third order, rank, degree, etc.," from L. tertiarius "of or pertaining to a third," from tertius "third." The geological sense (with capital T-) of "era after the Mesozoic" (which formerly was called the Secondary) is attested from 1794, after It. terziari, used in this sense 1760 by It.
geologist Giovanni Arduino (1714-1795).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

tertiary ter·ti·ar·y (tûr'shē-ěr'ē)

  1. Third in place, order, degree, or rank.

  2. Of or relating to salts of acids containing three replaceable hydrogen atoms.

  3. Of or relating to organic compounds in which a group is bound to three nonelementary radicals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
tertiary  [%PREMIUM_LINK%]     (tûr'shē-ěr'ē)  Pronunciation Key 
Noun   Tertiary. The first period of the Cenozoic Era, from about 65 to 2 million years ago. During this time the continents took on their present form, and the climate changed from being warmer and wetter, in the early part of the period, to being drier and cooler in the later part. mammals replaced dinosaurs as the dominant form of terrestrial animal life, and many modern types of flowering plants, insects, mollusks, fish, amphibians, reptiles, and birds appeared. The Tertiary is subdivided into the Paleogene and the Neogene, although these terms are not as widely used as are the names of the epochs that constitute them. See Chart at geologic time.

    1. Relating to or having a carbon atom that is attached to three other carbon atoms in a molecule.

    2. Relating to an organic molecule, such as an alcohol, in which the functional group is attached to a tertiary carbon.

  1. Relating to an advanced level of medical care, usually provided by subspecialists after the delivery of primary medical care. Compare primary, secondary.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature