The Collaborative International Dictionary of English v.0.48:

cocozelle \cocozelle\ n.
   a squash plant having a dark green fruit with skin mottled
   with light green or yellow.

   Syn: Italian vegetable marrow.
        [WordNet 1.5]

   2. a squash resembling zucchini.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

cocozelle
    n 1: squash plant having dark green fruit with skin mottled with
         light green or yellow [syn: cocozelle, Italian vegetable
         marrow]
    2: squash resembling zucchini