Definitions

from The Century Dictionary and Cyclopedia

  • One of two primary groups into which Huxley divides the deciduate Mammalia (the other being Zonaria, which see), consisting of those Deciduata which have a discoidal placenta.
  • A group of echinoderms.
  • A family of peripylarian Radiolaria having the shell and central capsule discoid or lenticular. It includes Cenodiscus, Phacodiscus, Coccodiscus, and other genera.

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