icterus
C2CEFR level
93/100Rarity: very rare
TechnicalRegister
A yellowish discolouration of serum caused by raised bilirubin, which can bias certain colorimetric measurements.
The technologist flagged the icterus index because the deep yellow serum could distort the enzyme result.
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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