#fontanelle__fontanel__soft_spot  any membranous gap between the bones of the cranium in an infant or fetus
  supertype:  orifice__opening__porta  an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
  part of:  child's_body  cranium
  subtype:  anterior_fontanelle  corresponds to the bregma when bones have ossified
  subtype:  sphenoid_fontanelle__sphenoid_fontanel__sphenoidal_fontanelle__sphenoidal_fontanel  the irregularly shaped area on either side of the cranium where the frontal bone and the anterior tip of the parietal bone and the temporal bone and the greater wing of the sphenoid bone meet; corresponds to the pterion when bones have ossified

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