head circumference
B2CEFR level
60/100Rarity: rare
TechnicalRegister
The measurement around the widest part of an infant's head, used to monitor brain growth.
The health visitor measures head circumference at each review to screen for hydrocephalus.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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