Definitions
from The Century Dictionary.
- noun A Lower Carboniferous genus of selachian fishes of the family Psammodontidæ, known only from the teeth, which are large and more or less quadrangular, with thick, smooth roots almost as largo as the crown. The crown surface is porous and punctate or finely striated. The genus occurs in the Carboniferous of Europe and North America.
Etymologies
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Examples
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There are many fishes, some of which (acrodus, psammodus, &c.,) are presumed from remains of their palatal bones, to have been of the gigantic cartilaginous class, now represented by such as the cestraceon.
Vestiges of the Natural History of Creation Robert Chambers 1836
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