1. fontanelle

noun. any membranous gap between the bones of the cranium in an infant or fetus.


  • sphenoidal fontanelle
  • orifice
  • sphenoid fontanel
  • braincase
  • porta
  • soft spot
  • sphenoidal fontanel
  • child's body
  • anterior fontanelle
  • cranium
  • sphenoid fontanelle
  • opening
  • fontanel


  • strength
  • natural object
  • finish
  • closing


  • fontenelle (Old French (842-ca. 1400))

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Example sentences of the word fontanelle

1. Noun, singular or mass
Another of the soldier's defense mechanism is a sticky white substance excreted from the fontanelle -- a pore on the its head -- which gums up intruders and prevents their entry into the nest.

2. Verb, past tense
There is an especially noticeable soft spot -- a large suture -- at the top of a baby's skull, known as the *fontanelle*.