Definition of "terrarium" [terrarium]

• A small enclosure or closed container in which selected living plants and sometimes small land animals, such as turtles and lizards, are kept and observed. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If you want a wider range of possibilities for plants, an open terrarium is the way to go."
• "This type of terrarium is more durable and easier to maintain."
• "A terrarium is a small environment where plants and sometimes animals live together in their own little environment."