from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or belonging to the geologic time, rock series, or sedimentary deposits of the second epoch of the Tertiary Period, characterized by warm climates and the rise of most modern mammalian families. See Table at geologic time.
- n. The Eocene Epoch or its system of deposits.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. of a geologic epoch within the Paleogene period from about 56 to 34 million years ago.
- n. the Eocene epoch
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to the first in time of the three subdivisions into which the Tertiary formation is divided by geologists, and alluding to the approximation in its life to that of the present era.
from The Century Dictionary and Cyclopedia
- Literally, of the dawn of the recent: applied in geology to one of the divisions of the Tertiary, as originally suggested by Lyell.
- In paleontology, having existed in this geological period: said of animals whose remains occur in the Eocene.
- n. In geology, a division of the Tertiary. See Tertiary.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. from 58 million to 40 million years ago; presence of modern mammals
Sorry, no etymologies found.