WordNet (r) 3.0 (2006):

winter squash
    n 1: any of various plants of the species Cucurbita maxima and
         Cucurbita moschata producing squashes that have hard rinds
         and mature in the fall [syn: winter squash, winter
         squash plant]
    2: any of various fruits of the gourd family with thick rinds
       and edible yellow to orange flesh that mature in the fall and
       can be stored for several months