WordNet (r) 3.0 (2006):

turban squash
    n 1: squash plants bearing hard-shelled fruit shaped somewhat
         like a turban with a rounded central portion protruding
         from the end opposite the stem [syn: turban squash,
         Cucurbita maxima turbaniformis]
    2: large squash shaped somewhat like a turban usually with a
       rounded central portion protruding from the blossom end