from The Century Dictionary and Cyclopedia
- n. In botany, one of certain sacs or cavities in the leaves of officinal and other species of aloe, filled with a colorless or variously colored sap. They are thin-walled and semicircular in transverse section.
Sorry, no etymologies found.
The anthocyan dye is limited to the sap-cavity of the cells, while the yellow and pure orange colors are fixed in special organs of the protoplasm.