from The Century Dictionary and Cyclopedia

  • A family of tripylean radiolarians with a fenestrated shell which is spherical, simple, and composed of solid rods, and has at one point a large principal opening, often armed with coronal spicules, and with or without radial spicules. It contains such genera as Castanella, Castanidium, etc.


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.