from The Century Dictionary.
- noun A laying bare of the roots of trees to expose them to the air and water.
from the GNU version of the Collaborative International Dictionary of English.
- noun obsolete The act or process of laying bare the roots of trees to expose them to the air and water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
But though they require this refreshing at first, yet do they perfectly abhor all stercoration; nor will they much endure to have the earth open’d about their roots for ablaqueation, or be disturb’d: This is also to be understood of cypress.