Merriam-Webster Collegiate Dictionary - pumpkin

 noun  Usage: often attributive  Etymology: alteration of earlier pumpion, modification of French popon, pompon melon, ~, from Latin pepon-, pepo, from Greek pepon, from pepon ripened; akin to Greek pessein to cook, ripen — more at cook  Date: 1654  1.  a. the usually round orange fruit of an annual vine (Cucurbita pepo) of the gourd family widely cultivated as food  b. winter crookneck  c. British any of various large-fruited winter squashes (C. maxima)  2. a usually hairy prickly vine that produces ~s  3. a strong orange color