bottle gourd

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

• noun An annual cucurbit vine (Lagenaria siceraria) with white flowers, widely cultivated for its smooth hard-shelled fruits.
• noun The dried and hollowed-out shell of one of these fruits, often used as a container, a drinking utensil, a musical instrument, or a decorative object.

from The Century Dictionary.

• noun The fruit of Lagenaria vulgaris, natural order Cucurbitaceœ. See gourd and Lagenaria.

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

• noun Old World climbing plant with hard-shelled bottle-shaped gourds as fruits