Also found in: Medical.


n. pl. megafauna or meg·a·fau·nas
Large or relatively large animals of a particular region, period, or habitat: Pleistocene megafauna; crabs and other aquatic megafauna.

meg′a·fau′nal adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) relating to the megafauna of a region or period
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Researchers found that the increased radiation dose from the muons as a result of the erupting stars contributed to the marine megafaunal extinction.
A supernova 2.6 million years ago may be related to a marine megafaunal extinction at the Pliocene-Pleistocene boundary where 36 percent of the genera were estimated to become extinct.
The study also confirmed previous evidence of megafaunal extinction starting around 1200 years BP.
The large size of many of these fruits has led authors to conclude the megafaunal mammals were the main seed dispersers for these species (janzen and Martin.
There have been plenty of other oversized penguins in the fossil record, but those species came tens of millions of years later, leading many researchers to figure that it probably took time for penguins to evolve into megafaunal species.
Thieving rodents as substitute dispersers of megafaunal seeds.
Abyssal hills - hidden source of increased habitat heterogeneity, benthic megafaunal biomass and diversity in the deep sea.
First, Bison survived the megafaunal extinction at the end of the Pleistocene approximately 11,700 calendar years Before Present (cal yr BP) and, in North America, the genus outlived mammoths (Mammuthus), mastodons (Mammut), horses (Equus), ground sloths (Megalonyx et al.), and other megafauna while coexisting with early Americans (Paleoindians; Koch and Barnosky, 2006).
Establishing a baseline of understanding and quantifying the role of megafaunal cleaning stations is a useful component in the assessment of ecosystem health in this protected region.
To correct this dramatic megafaunal loss, Josh Donlan and ten other biologists, including Foreman and Soule, have launched the idea of 'Pleistocene rewilding' (Donlan et al., 2005, 2006).