from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A spongy tissue with large air spaces found between the cells of the stems and leaves of aquatic plants, providing buoyancy and allowing the circulation of gases.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A spongy, airy tissue founds especially in the roots of aquatic plants.
New Latin : aer(o)- + Greek enkhuma, filling (from enkhein, to pour in : en-, in; see en-2 + khein, to pour; see chyme).(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin aer ("air") + -enchyma (Wiktionary)