(idiomatic) feigned sleep while actually alert

Misspelling of centrifugal.

(archaic, UK, slang) Alternative form of fullam (“loaded die”) / (archaic, UK, colloquial, by extension) Alternative form of fullam (“sham”)

Through the unbroken skin (as for example with measurements of blood glucose level with an optical glucometer using photometry or of oxygen saturation via pulse oximetry).