Webster's Revised Unabridged Dictionary
- Tortoise beetle (Zoöl) any one of numerous species of small tortoise-shaped beetles. Many of them have a brilliant metallic luster. The larvæ feed upon the leaves of various plants, and protect themselves beneath a mass of dried excrement held over the back by means of the caudal spines. The golden tortoise beetle (Cassida aurichalcea) is found on the morning-glory vine and allied plants.