Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A former name for a euphorbiaceous genus (Hevea) of South American trees, the principal source of caoutchouc.

from The Century Dictionary and Cyclopedia

  • n. Plural of siphonium.
  • n. A genus of pear-shaped, silicious, lithistid sponges with a long or short peduncle, the interior having a deep cloaca and numerous arched canals. It abounds in the Cretaceous rocks.

Etymologies

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