hydrocephalus
C1CEFR level
80/100Rarity: very rare
TechnicalRegister
An abnormal accumulation of cerebrospinal fluid within the ventricles of the brain, raising intracranial pressure.
The obstructing tumour caused acute hydrocephalus, and an external ventricular drain was inserted urgently.
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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