What does fonticulus mean?
Fonticulus is a specialist medical noun meaning a fontanelle, the soft, membranous space between the not-yet-fully-fused bones of an infant's skull. The principal examples are the anterior fonticulus at the top of the skull and the posterior fonticulus toward the back. These openings allow the skull to mould during childbirth and help accommodate the rapid growth of a newborn's brain. In general medical writing, the English word fontanelle is much more common, while fonticulus appears especially in technical, anatomical, and historical contexts. The name comes from Latin fonticulus, a diminutive of fons, meaning 'spring' or 'fountain.' The metaphor compares the delicate membranous opening to a small spring. Because it refers to a specific part of infant anatomy, fonticulus is especially associated with obstetric and neonatal examinations.
nounA membranous space between the incompletely fused bones of an infant's skull, especially the anterior or posterior fontanelle. It is a specialist medical term for a fontanelle or 'soft spot.'
- A membranous space between the bones of an infant's skull, especially the anterior or posterior fontanelle.
"The anterior fonticulus permits the skull to mould during childbirth."
"The anterior fonticulus permits skull moulding during birth."
"The clinician palpated the posterior fonticulus during the neonatal examination."
The Latin plural form fonticuli is standard in medical usage.
"The anterior and posterior fonticuli were examined during the neonatal assessment."
A baby's soft spot is literally a 'little fountain' in Latin: fonticulus is a diminutive of fons, meaning 'spring' or 'fountain.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does fonticulus come from?
The word comes from Latin fonticulus, the diminutive of fons, meaning 'fountain' or 'spring.' In medical usage, the term refers to the small membranous spaces in an infant's skull, whose name reflects an image of a tiny spring or fountain. It is related to font, fountain, fount, and fontanelle, all of which continue the Latin fountain or spring tradition.
How fonticulus is actually used
A specialist medical term, chiefly used in obstetrics, pediatrics, and anatomy. It is uncommon in general prose and may sound formal or technical.