Definitions

from The Century Dictionary and Cyclopedia

  • n. A genus of sea-urchins: same as Leskia, 2.
  • n. [lowercase]; pl. palæostomata (pā-lē˙-ō˙-stō′ ma-tä), In embryology, the primitive mouth-opening of the vertebrates; an ancient structure lying in front of the present mouth opening, or neostoma, which some embryologists suppose to have arisen secondarily from a pair of branchial clefts.

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