butternut squash

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

• noun A variety of winter squash (Cucurbita moschata) having a long neck and round base, a smooth tan rind, and yellow or orange flesh.

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

• noun Curcurbita moschata: a vase-shaped orange-fleshed hard winter squash.

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

• noun plant bearing buff-colored squash having somewhat bottle-shaped fruit with fine-textured edible flesh and a smooth thin rind
• noun buff-colored squash with a long usually straight neck and sweet orange flesh