Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

tongue-shaped
     adj : shaped like a tongue [syn: {lingulate}]