Help Wordnik hunt for a million missing words by backing our Kickstarter!


from The Century Dictionary and Cyclopedia

  • n. Any tetrabranchiate cephalopod shell which is closely or loosely coiled in an asymmetrical depressed or elevated spiral. Such shells among the Nautiloidea are distinguished as trochoceracones, and among the Ammonoidea as turriliticones. In all cases they present phylogerontic stages of the particular races of which they are the terminals.


Sorry, no etymologies found.


Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.