Any time span in earth history; such as, absolute age of rock or mineral, relative age of one rock unit compared with another, "age of reptiles", referring to the time when reptiles were dominant animals on the earth.

Time represented by the time-stratigraphic unit called Stage (initial capital letter used in formal nomenclature).

John Robertson:

I received your book on 6/26/00. Congratulations on a great book. You no doubt spent a great amount of time in research. I find the book fascinating.

It’s been over 45 years since I studied Latin and Greek in college and unless one keeps it up, one tends to forget. You have rekindled my interest. Now that I’m retired, I’ll have more time. I have always been interested in the origin of words especially from Latin and Greek.

Because the schools do not teach Latin and Greek as they once did, your book would be invaluable in helping students with the English language; thereby enriching their thought process. I am so happy that we still have people in this world who regard knowledge of Latin and Greek essential to scholarly development.

To quote Seneca, Jr. from your book: “Non scholae, sed vitae discimus.” Thank you for your “illusions” and also many thanks to your wife.

Jeffrey

Note from your editor: The “illusions” referred to the dedication in Words for a Modern Age, A Cross Reference of Latin and Greek Combining Elements in which I wrote: “Dedicated to my wife, who has been my sine qua non. She has kept me in good health with her loving concern for my well being and has rarely interfered with my efforts to strive for my ‘illusions.’ ”

The Latin quotation by Seneca, Jr. means: “We don’t learn just for school, but we learn for life.”.

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Speaking of books. The following came from "The Spelling Newsletter" published by Ray Laurita, Leonardo Press, PO Box 1326, Camden, ME 04843.

Can This Be True? Department

After reading the following exchange which appeared in the Metropolitan Diary, I have a feeling that our readers will be equally dismayed:

Carol Ruth Langer stopped at the information desk of a Barnes & Noble in Midtown to inquire about a copy of the Book of Job.

"How would you be spelling 'Job'?" the clerk asked.

"J -- O -- B", Ms. Langer said.

"Job books are in the career section."

Ms. Langer tried again. "Not job, Job, a book in the Bible".

"Who is the author" the clerk asked.

At that point, Ms. Langer knew it was time to leave.

As seen in the May 15, 2000, issue of the New York Times.

Time before the present stated in years; referring to geologic events, generally based on measurement of radioactive decay rates and products of minerals or rock substances; such as, the uraniumlead method, carbon-14 method, etc.

Chronological date when one reaches adulthood, usually either 18 or 21; when juveniles are no longer under the jurisdiction of the juvenile courts, but rather the criminal courts.

The regular changing of labor roles by colony members as they age: Susan read in an article that age polyethism referred to the modification of labor roles of ants taking place on a regular basis due to ageing ants.

The estimated age of an individual based on the person's structure: Anatomic age is the physical age of a human being and relates to the development or deterioration of the body as compared to that of other people of the same chronological age.

A period of the human past when bronze was the dominant material used for tools. Its date varies from place to place.

A period of the human past when copper was the dominant material used for tools.

Its date varies from place to place.

Period of the human past when iron was the dominant material used for tools.

Its date varies from place to place.

Called the Würm, Weichsel, or Wisconsin glaciation depending where on earth it took place.

This period, which lasted from about 115,000 to 12,000 years ago, is characterized by massive glaciers that covered large portions of the northern hemisphere.

The age at which workers generally are no longer required to work for a living; especially, the age at which a pension is payable: The union contract for the agency stipulates an open retirement age for union members; in other words, there is no mandatory age for retirement.

A generic term for that period of the human past in which stone, bone, and wood were the primary raw materials from which tools were made.

It covers the Paleolithic, Mesolithic, and Neolithic periods.

The point on the Hertzsprung-Russell diagram occupied by a star that has a core temperature high enough for nuclear reactions.