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A herbivorous hadrosaurid dinosaur of the genus Maiasaura of the Cretaceous Period. Remains of fossilized nests and juveniles suggest that the adults cared for their young.

[New Latin Māiasaura, good mother lizard, genus name : Greek maia, good mother; see mā- in Indo-European roots + New Latin saura, feminine of saurus, lizard (from Greek sauros).]
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.


(Palaeontology) a species of large, herbivorous, duck-billed dinosaur
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(mī′ə-sôr′ə) or mai·a·saur (mī′ə-sôr′)
A duck-billed dinosaur of the late Cretaceous Period of North America. Its remains suggest that the adults lived in herds and cared for their young in large nesting sites.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Despite the incessant summer rain, our team also managed to collect the partial skull of what we believe is the first evidence from Canada of the "Good Mother" hadrosaur, Maiasaura. We are working feverishly in the lab to prepare these new and exciting fossils for eventual display.
After seeing nestling bones of the plant-eating maiasaura at the Two Medicine Dinosaur Center in Bynum, we drive U.S.
Then we drive back over the mountains, dreaming of maiasaura dinosaurs, Indian ponies, and, of course, Taylor and Bob.
* Maiasaura: A plant-eating duckbill dinosaur, whose name means "good mother lizard";
One of Horner's discoveries was Maiasaura (the first use of the feminine "a" ending versus the masculine "us"), meaning "good mother lizard." Around this time, in case you don't recall, the hottest talk-show host was Phil Donahue and the president was Jimmy Carter.
He named this kind of dinosaur Maiasaura (my-uh-SORE-uh), which means "good mother lizard."
The scientists wonder if Maiasaura babies also ground their teeth together before hatching.
The blocks, whose widths range up to 30 centimeters, come from a geologic formation in Montana that has yielded numerous bones of the duck-billed dinosaur Maiasaura. Most of the plant fragments are less than 3 cm long, with their edges rough and angular as if cut into pieces.
If they are coprolites, the finds offer clues to what Maiasaura ate.
Based on Hormer's 1978 discovery of a dinosaur nesting area near Choteau that's become known as Egg Mountain, a duck-billed dinosaur (Maiasaura, "good mother lizard") is hwon gently feeding a nest of hungry youngstersf this display demonstrates Horner's theory that the duck-billed dinosaurs tended their young as birds do.
Other exhibits show the development of a Maiasaura thighbone from birth, what colors dinosaurs might have been, and how dinosaurs migrated from the shores of an inland sea to dry, upland nesting colonies to feed and care for their young.
Paleontologist John Horner of the Museum of the Rockies in Bozeman, Mont., discovered a series of nests in Choteau, Mont., tht had belonged to duckbilled Maiasaura. Because young Maiasaura of different ages and sizes were found in nests, some ages and sizes were found in nests, some scientists have concluded that parents were protecting and feeding thrir young until they were large enough to fend for themselves.