[1] : The Collaborative International Dictionary of English v.0.48

pumpkin \pump"kin\, n. for older pompion, pompon, of. pompon,
   l. pepo, peponis, gr. ?, properly, cooked by the sun, ripe,
   mellow; -- so called because not eaten till ripe. cf. cook,
   n. bot.
   a well-known trailing plant cucurbita pepo and its fruit,
   -- used for cooking and for feeding stock; a pompion.
   1913 webster

   pumpkin seed.
   a the flattish oval seed of the pumpkin.
   b zool. the common pondfish.
       1913 webster
see also:
cook cucurbita pepo pumpkin seed 

[2] : WordNet (r) 2.0

pumpkin
     n 1: a coarse vine widely cultivated for its non-keeping large
          pulpy round orange fruit with firm orange skin and
          numerous seeds; subspecies of cucurbita pepo include the
          summer squashes and a few autumn squashes syn: pumpkin
          vine, autumn pumpkin, cucurbita pepo
     2: usually large pulpy deep-yellow round fruit of the squash
        family maturing in late summer or early autumn
see also:
pumpkin vine autumn pumpkin cucurbita pepo 

[3] : The Free On-line Dictionary of Computing (27 SEP 03)

pumpkin
     
         a humourous term for the token - the object
        notional or real that gives its possessor the "pumpking" or
        the "pumpkineer" exclusive access to something, e.g. applying
        patches to a master copy of source for which the pumpkin
        is called a "patch pumpkin".
     
        chip salzenberg  wrote:
     
        david croy once told me once that at a previous job, there was
        one tape drive and multiple systems that used it for backups.
        but instead of some high-tech exclusion software, they used a
        low-tech method to prevent multiple simultaneous backups: a
        stuffed pumpkin.  no one was allowed to make backups unless
        they had the "backup pumpkin".
     
        1999-02-23
     
     
see also:
token patches source 

Pumpkin >> P Words
Pumpkin, definition of term: Pumpkin
pumpkin_pag1.html

Pumpkin Seed >> P Words
Pumpkin Seed, definition of term: Pumpkin Seed
pumpkin+seed_pag1.html