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Any of various extinct hominins.

pro′to·hu′man 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.


(Animals) any of various prehistoric primates that resembled modern man
(Animals) of or relating to any of these primates
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌproʊ toʊˈhyu mən or, often, -ˈyu-)

1. of, pertaining to, or resembling extinct hominid populations that had some but not all the features of modern Homo sapiens.
2. a protohuman animal.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Zallinger, and Heinrich Harder, among others: artists who render the lives and surroundings of the real-life monsters and protohumans who inhabited the earth many millennia ago.
"Perhaps protohumans, thousands and millions of years ago, felt the same: like merely fragile specks on the land.
Fossils found in East Africa suggest that protohumans roamed the area more than 20 million years ago.
Ever since protohumans moved out of fruit - and vegetable-rich habitats, Pauling said, they have suffered great deficiencies of vitamin C.
But other apes have brain structures with the same gross anatomy as both Broca and Wernicke (Gannon et al., 1998; Cantalupo and Hopkins, 2001), so the imprints of such areas in the skulls of protohumans tell us nothing useful about language.
And not least among her lessons is Ardi's reminder that science can inform history, a message that Buckle himself emphasized decades before fossil evidence of protohumans first came to light.
LINDA tp = nidal LINDA ta1 = denial, inland, island, nailed, unlaid THOMPSON ta3 = protohumans, taphonomies, taphonomist
If one imagines that, as do contemporary humans, protohumans found themselves in a variety of different environments, the idea of a species-typical set of reproductive behaviors becomes nonsensical.
In Africa, sometime between 10 and 6 million years ago, bipedal protohumans split off from the forerunners of today's chimpanzee and gorilla.
The awe is genuine, the reference to deity not merely a casual blasphemy, for a god had lived in that tree--a forest god feared and revered from the very beginning of our time on the planet, when protohumans left the forest, stood upright, and with an opposed thumb, a hungry belly, and year-round estrus came to dominate the world.
Protohumans probably started losing their hair in response to a change in climate about three million years ago.
Evolutionary pressure must have driven protohumans to be able to produce a wide array of sounds from high to low.