I have turned to the American Heritage dictionary, but without success.

My American Heritage dictionary suggests I have every right to.

According to American Heritage Dictionary, image is a mental picture of something not present or real.

He is on the usage panel for the American Heritage Dictionary.

According to the American Heritage Dictionary, the origin of the word is unknown.

According to the American Heritage Dictionary, a namesake is a person or thing named after another.

Or so says the red American Heritage dictionary.

Two years ago, his coinage made it into the American Heritage Dictionary.

The American Heritage Dictionary was an immediate success, selling more than a million copies in its first year.

The American Heritage Dictionary adds "so named from being hard to digest".