Word Study
brontozoum
CIDE DICTIONARY
brontozoum, n. [NL., fr. Gr. thunder + animal.].
An extinct animal of large size, known from its three-toed footprints in Mesozoic sandstone. [1913 Webster]
" The tracks made by these reptiles are found eighteen inches in length, and were formerly referred to gigantic birds; but the discovery of large bipedal three-toed dinosaurs has suggested that they were made by those reptiles." [1913 Webster]
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