succulent

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Full of juice or sap; juicy.
• adjective Botany Having thick, fleshy, water-storing leaves or stems.
• adjective Highly interesting or enjoyable; delectable.
• noun A succulent plant, such as a sedum or cactus.

from The Century Dictionary.

• Full of juice; specifically, in botany, juicy; thick and fleshy: noting plants that have the stems or leaves thick or fleshy and juicy, as in the houseleek and live-for-ever, the orders Cactaceæ, Crassulaceæ, etc.
• Hence Figuratively, affording mental sustenance; not dry.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Full of juice; juicy.
• adjective plants (Bot.), plants which have soft and juicy leaves or stems, as the houseleek, the live forever, and the species of Mesembryanthemum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective juicy or lush
• adjective interesting or delectable
• adjective botany having fleshy leaves or other tissues that store water
• noun a succulent plant (such as cactus)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective full of juice
• noun a plant adapted to arid conditions and characterized by fleshy water-storing tissues that act as water reservoirs