Definition of "box tortoise" []

• A land tortoise or turtle of the genera Cistudo and Emys; -- so named because it can withdraw entirely within its shell, which can be closed by hinged joints in the lower shell. Also, humorously, an exceedingly reticent person. (noun)
• See under Box, Land, etc. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)