spearmint definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a fragrant perennial plant (Mentha spicata) of the mint family, used for flavoring
Origin: probably from the appearance of the flowers on the stem
spearmint definition by American Heritage Dictionary
An aromatic Eurasian plant (Mentha spicata) having clusters of small purplish flowers and yielding an oil used widely as a flavoring.