Top Definition
A the part of a plant that protects and lubricates the root as it penetrates deeper into the soil. It is also known as slang for condom.
Examples of the words use
Did you use a root cap? Did you cap your root?
by Lakeheadustudent October 12, 2007
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.