The Collaborative International Dictionary of English v.0.48:

Fontanelle \Fon`ta`nelle"\, n. [F.] (Anat.)
   Same as Fontanel, 2.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fontanelle
    n 1: any membranous gap between the bones of the cranium in an
         infant or fetus [syn: fontanelle, fontanel, soft
         spot]

U.S. Gazetteer Places (2000):

Fontanelle, IA -- U.S. city in Iowa
   Population (2000):    692
   Housing Units (2000): 328
   Land area (2000):     0.892258 sq. miles (2.310938 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.892258 sq. miles (2.310938 sq. km)
   FIPS code:            28290
   Located within:       Iowa (IA), FIPS 19
   Location:             41.289995 N, 94.562230 W
   ZIP Codes (1990):     50846
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Fontanelle, IA
    Fontanelle