Definitions

from The Century Dictionary and Cyclopedia

  • n. A genus of ferns variously limited, but in its broad sense including all those in which the dot-like sori are covered by a roundish, peltate, or reniform indusium.
  • n. A genus of hymenopterous insects. Also Aspidion.
  • n. In pharmacy, the rhizome of Dryopteris Filix-mas and D. marginalis, the oleoresin obtained from which is used for the expulsion of tape-worms.

Etymologies

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Examples

  • The most important of the larger species are woodwardia, aspidium, asplenium, and, above all, the common pteris.

    The Yosemite

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