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.
Sorry, no etymologies found.