from the GNU version of the Collaborative International Dictionary of English
- n. A genus of large trilobites characteristic of the primordial formations.
from The Century Dictionary and Cyclopedia
- n. The typical genus of Paradoxididæ. It contains very large trilobites, some two feet long, with sixteen or more thoracic segments. Brongniart. Also Paradoxites (Goldfuss, 1843).
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