The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
tongue-shaped adj 1: shaped like a tongue [syn: lingulate, tongue-shaped]