craniosynostosis

noun

craniosynostosis is spelled C-R-A-N-I-O-S-Y-N-O-S-T-O-S-I-S: 16 letters. It appears about once in every 31 million words in written English, the 169,822nd most frequent word form (wordfreq, 2021 data). As a noun, craniosynostosis means “A medical condition in which some or all of the sutures in the skull of an infant close too early, causing problems with normal brain and skull growth” (English Wiktionary, September 2026). The plural of craniosynostosis is craniosynostoses.

How many letters and syllables are in craniosynostosis?

Letters	16: C-R-A-N-I-O-S-Y-N-O-S-T-O-S-I-S
In writing	about once in every 31 million words; the 169,822nd most frequent word form
Wrong spellings searched	none measured in search

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How common is craniosynostosis?

Craniosynostosis appears about once in every 31 million words in written English, the 169,822nd most frequent word form in the list.

craniosynostosis0.0010.010.11101001,00010,000

rarerper million words of written Englishmore common

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Forms of craniosynostosis

craniosynostoses plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does craniosynostosis mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

1
A medical condition in which some or all of the sutures in the skull of an infant close too early, causing problems with normal brain and skull growth.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).