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A bluish discolouration, applied especially to such discolouration of skin and mucous membranes due to excessive concentration of reduced haemoglobin in the blood.
A noisy inspiration occurring in coma or deep sleep, sometimes due to obstruction of the larynx or upper airways.
An agent that causes insensitivity to pain. Applied to either the whole body (general anaesthetic) or a particular area or region (local anaesthetic).
A device for breathing in a drug in order to deliver it to the airways or lungs.
A volatile liquid (resulting from the action of sulphuric acid upon alcohol) formerly used as an anaesthetic. Ether was usually inhaled.