Dictionary.net

• Shaped like a tongue; specifically (Bot.), linear or oblong, and fleshy, blunt at the end, and convex beneath; as, a tongue-shaped leaf.

2010 - New Age Dictionary Database
By Oddity Software

• Shaped like a tongue; specifically (Bot.), linear or oblong, and fleshy, blunt at the end, and convex beneath; as, a tongue-shaped leaf.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.